Home / 15,740.28-21,721.32-8,666.64

Finding the Fourth Proportional to 15,740.28, 21,721.32 and 8,666.64

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Solution

The fourth proportional to 15,740.28, 21,721.32 and 8,666.64 is: 11,959.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.28 : 21,721.32 = 8,666.64 : x
  2. Step 2: Convert to fraction form
    15,740.28/21,721.32 = 8,666.64/x
  3. Step 3: Cross multiply
    15,740.28x = 21,721.32 × 8,666.64
  4. Step 4: Simplify right side
    15,740.28x = 188,250,860.76
  5. Step 5: Solve for x
    x = 188,250,860.76/15,740.28
  6. Step 6: Final answer
    x = 11,959.82

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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.