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Finding the Fourth Proportional to 28,586.91, 42,880.37 and 13,008.99

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Solution

The fourth proportional to 28,586.91, 42,880.37 and 13,008.99 is: 19,513.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,586.91 : 42,880.37 = 13,008.99 : x
  2. Step 2: Convert to fraction form
    28,586.91/42,880.37 = 13,008.99/x
  3. Step 3: Cross multiply
    28,586.91x = 42,880.37 × 13,008.99
  4. Step 4: Simplify right side
    28,586.91x = 557,830,239.48
  5. Step 5: Solve for x
    x = 557,830,239.48/28,586.91
  6. Step 6: Final answer
    x = 19,513.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.