Home / 15,530.28-21,432.12-8,456.70

Finding the Fourth Proportional to 15,530.28, 21,432.12 and 8,456.70

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Solution

The fourth proportional to 15,530.28, 21,432.12 and 8,456.70 is: 11,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.28 : 21,432.12 = 8,456.70 : x
  2. Step 2: Convert to fraction form
    15,530.28/21,432.12 = 8,456.70/x
  3. Step 3: Cross multiply
    15,530.28x = 21,432.12 × 8,456.70
  4. Step 4: Simplify right side
    15,530.28x = 181,245,009.20
  5. Step 5: Solve for x
    x = 181,245,009.20/15,530.28
  6. Step 6: Final answer
    x = 11,670.43

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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.