Home / 15,520.47-21,417.58-8,446.87

Finding the Fourth Proportional to 15,520.47, 21,417.58 and 8,446.87

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Solution

The fourth proportional to 15,520.47, 21,417.58 and 8,446.87 is: 11,656.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.47 : 21,417.58 = 8,446.87 : x
  2. Step 2: Convert to fraction form
    15,520.47/21,417.58 = 8,446.87/x
  3. Step 3: Cross multiply
    15,520.47x = 21,417.58 × 8,446.87
  4. Step 4: Simplify right side
    15,520.47x = 180,911,513.97
  5. Step 5: Solve for x
    x = 180,911,513.97/15,520.47
  6. Step 6: Final answer
    x = 11,656.32

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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.