Home / 15,731.13-21,708.14-8,656.19

Finding the Fourth Proportional to 15,731.13, 21,708.14 and 8,656.19

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Solution

The fourth proportional to 15,731.13, 21,708.14 and 8,656.19 is: 11,945.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.13 : 21,708.14 = 8,656.19 : x
  2. Step 2: Convert to fraction form
    15,731.13/21,708.14 = 8,656.19/x
  3. Step 3: Cross multiply
    15,731.13x = 21,708.14 × 8,656.19
  4. Step 4: Simplify right side
    15,731.13x = 187,909,632.56
  5. Step 5: Solve for x
    x = 187,909,632.56/15,731.13
  6. Step 6: Final answer
    x = 11,945.08

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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.