Home / 15,287.52-21,093.60-9,990.12

Finding the Fourth Proportional to 15,287.52, 21,093.60 and 9,990.12

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Solution

The fourth proportional to 15,287.52, 21,093.60 and 9,990.12 is: 13,784.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,287.52 : 21,093.60 = 9,990.12 : x
  2. Step 2: Convert to fraction form
    15,287.52/21,093.60 = 9,990.12/x
  3. Step 3: Cross multiply
    15,287.52x = 21,093.60 × 9,990.12
  4. Step 4: Simplify right side
    15,287.52x = 210,727,595.23
  5. Step 5: Solve for x
    x = 210,727,595.23/15,287.52
  6. Step 6: Final answer
    x = 13,784.29

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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.