Home / 15,388.47-21,234.56-9,421.83

Finding the Fourth Proportional to 15,388.47, 21,234.56 and 9,421.83

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Solution

The fourth proportional to 15,388.47, 21,234.56 and 9,421.83 is: 13,001.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.47 : 21,234.56 = 9,421.83 : x
  2. Step 2: Convert to fraction form
    15,388.47/21,234.56 = 9,421.83/x
  3. Step 3: Cross multiply
    15,388.47x = 21,234.56 × 9,421.83
  4. Step 4: Simplify right side
    15,388.47x = 200,068,367.34
  5. Step 5: Solve for x
    x = 200,068,367.34/15,388.47
  6. Step 6: Final answer
    x = 13,001.19

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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.