Home / 15,275.31-21,080.76-8,563.09

Finding the Fourth Proportional to 15,275.31, 21,080.76 and 8,563.09

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Solution

The fourth proportional to 15,275.31, 21,080.76 and 8,563.09 is: 11,817.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,275.31 : 21,080.76 = 8,563.09 : x
  2. Step 2: Convert to fraction form
    15,275.31/21,080.76 = 8,563.09/x
  3. Step 3: Cross multiply
    15,275.31x = 21,080.76 × 8,563.09
  4. Step 4: Simplify right side
    15,275.31x = 180,516,503.61
  5. Step 5: Solve for x
    x = 180,516,503.61/15,275.31
  6. Step 6: Final answer
    x = 11,817.54

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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.