Home / 15,565.28-21,478.54-8,491.64

Finding the Fourth Proportional to 15,565.28, 21,478.54 and 8,491.64

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Solution

The fourth proportional to 15,565.28, 21,478.54 and 8,491.64 is: 11,717.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.28 : 21,478.54 = 8,491.64 : x
  2. Step 2: Convert to fraction form
    15,565.28/21,478.54 = 8,491.64/x
  3. Step 3: Cross multiply
    15,565.28x = 21,478.54 × 8,491.64
  4. Step 4: Simplify right side
    15,565.28x = 182,388,029.41
  5. Step 5: Solve for x
    x = 182,388,029.41/15,565.28
  6. Step 6: Final answer
    x = 11,717.62

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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.