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Finding the Fourth Proportional to 27,905.31, 38,487.02 and 18,354.99

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Solution

The fourth proportional to 27,905.31, 38,487.02 and 18,354.99 is: 25,315.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,905.31 : 38,487.02 = 18,354.99 : x
  2. Step 2: Convert to fraction form
    27,905.31/38,487.02 = 18,354.99/x
  3. Step 3: Cross multiply
    27,905.31x = 38,487.02 × 18,354.99
  4. Step 4: Simplify right side
    27,905.31x = 706,428,913.12
  5. Step 5: Solve for x
    x = 706,428,913.12/27,905.31
  6. Step 6: Final answer
    x = 25,315.21

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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.