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Finding the Fourth Proportional to 28,606.39, 42,902.74 and 9,887.08

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Solution

The fourth proportional to 28,606.39, 42,902.74 and 9,887.08 is: 14,828.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,606.39 : 42,902.74 = 9,887.08 : x
  2. Step 2: Convert to fraction form
    28,606.39/42,902.74 = 9,887.08/x
  3. Step 3: Cross multiply
    28,606.39x = 42,902.74 × 9,887.08
  4. Step 4: Simplify right side
    28,606.39x = 424,182,822.60
  5. Step 5: Solve for x
    x = 424,182,822.60/28,606.39
  6. Step 6: Final answer
    x = 14,828.25

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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.