Home / 15,715.85-21,686.05-9,001.07

Finding the Fourth Proportional to 15,715.85, 21,686.05 and 9,001.07

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Solution

The fourth proportional to 15,715.85, 21,686.05 and 9,001.07 is: 12,420.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.85 : 21,686.05 = 9,001.07 : x
  2. Step 2: Convert to fraction form
    15,715.85/21,686.05 = 9,001.07/x
  3. Step 3: Cross multiply
    15,715.85x = 21,686.05 × 9,001.07
  4. Step 4: Simplify right side
    15,715.85x = 195,197,654.07
  5. Step 5: Solve for x
    x = 195,197,654.07/15,715.85
  6. Step 6: Final answer
    x = 12,420.43

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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.