Home / 15,505.92-21,398.25-8,432.35

Finding the Fourth Proportional to 15,505.92, 21,398.25 and 8,432.35

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Solution

The fourth proportional to 15,505.92, 21,398.25 and 8,432.35 is: 11,636.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.92 : 21,398.25 = 8,432.35 : x
  2. Step 2: Convert to fraction form
    15,505.92/21,398.25 = 8,432.35/x
  3. Step 3: Cross multiply
    15,505.92x = 21,398.25 × 8,432.35
  4. Step 4: Simplify right side
    15,505.92x = 180,437,479.89
  5. Step 5: Solve for x
    x = 180,437,479.89/15,505.92
  6. Step 6: Final answer
    x = 11,636.68

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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.