Home / 15,213.90-21,102.59-14,809.31

Finding the Fourth Proportional to 15,213.90, 21,102.59 and 14,809.31

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Solution

The fourth proportional to 15,213.90, 21,102.59 and 14,809.31 is: 20,541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.90 : 21,102.59 = 14,809.31 : x
  2. Step 2: Convert to fraction form
    15,213.90/21,102.59 = 14,809.31/x
  3. Step 3: Cross multiply
    15,213.90x = 21,102.59 × 14,809.31
  4. Step 4: Simplify right side
    15,213.90x = 312,514,691.60
  5. Step 5: Solve for x
    x = 312,514,691.60/15,213.90
  6. Step 6: Final answer
    x = 20,541.39

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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 (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.