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Finding the Fourth Proportional to 15,654.68, 21,602.65 and 8,938.99

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Solution

The fourth proportional to 15,654.68, 21,602.65 and 8,938.99 is: 12,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,654.68 : 21,602.65 = 8,938.99 : x
  2. Step 2: Convert to fraction form
    15,654.68/21,602.65 = 8,938.99/x
  3. Step 3: Cross multiply
    15,654.68x = 21,602.65 × 8,938.99
  4. Step 4: Simplify right side
    15,654.68x = 193,105,893.74
  5. Step 5: Solve for x
    x = 193,105,893.74/15,654.68
  6. Step 6: Final answer
    x = 12,335.35

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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.