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Finding the Fourth Proportional to 28,148.67, 38,843.42 and 15,573.42

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Solution

The fourth proportional to 28,148.67, 38,843.42 and 15,573.42 is: 21,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,148.67 : 38,843.42 = 15,573.42 : x
  2. Step 2: Convert to fraction form
    28,148.67/38,843.42 = 15,573.42/x
  3. Step 3: Cross multiply
    28,148.67x = 38,843.42 × 15,573.42
  4. Step 4: Simplify right side
    28,148.67x = 604,924,816.03
  5. Step 5: Solve for x
    x = 604,924,816.03/28,148.67
  6. Step 6: Final answer
    x = 21,490.35

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.