Home / 15,740.32-21,720.84-8,665.38

Finding the Fourth Proportional to 15,740.32, 21,720.84 and 8,665.38

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Solution

The fourth proportional to 15,740.32, 21,720.84 and 8,665.38 is: 11,957.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.32 : 21,720.84 = 8,665.38 : x
  2. Step 2: Convert to fraction form
    15,740.32/21,720.84 = 8,665.38/x
  3. Step 3: Cross multiply
    15,740.32x = 21,720.84 × 8,665.38
  4. Step 4: Simplify right side
    15,740.32x = 188,219,332.52
  5. Step 5: Solve for x
    x = 188,219,332.52/15,740.32
  6. Step 6: Final answer
    x = 11,957.78

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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.