Home / 15,520.28-21,409.11-9,547.74

Finding the Fourth Proportional to 15,520.28, 21,409.11 and 9,547.74

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Solution

The fourth proportional to 15,520.28, 21,409.11 and 9,547.74 is: 13,170.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.28 : 21,409.11 = 9,547.74 : x
  2. Step 2: Convert to fraction form
    15,520.28/21,409.11 = 9,547.74/x
  3. Step 3: Cross multiply
    15,520.28x = 21,409.11 × 9,547.74
  4. Step 4: Simplify right side
    15,520.28x = 204,408,615.91
  5. Step 5: Solve for x
    x = 204,408,615.91/15,520.28
  6. Step 6: Final answer
    x = 13,170.42

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Half scale
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Double scale
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Similar ratio
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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.