Home / 20,729.40-31,094.10-14,387.10

Finding the Fourth Proportional to 20,729.40, 31,094.10 and 14,387.10

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Solution

The fourth proportional to 20,729.40, 31,094.10 and 14,387.10 is: 21,580.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.40 : 31,094.10 = 14,387.10 : x
  2. Step 2: Convert to fraction form
    20,729.40/31,094.10 = 14,387.10/x
  3. Step 3: Cross multiply
    20,729.40x = 31,094.10 × 14,387.10
  4. Step 4: Simplify right side
    20,729.40x = 447,353,926.11
  5. Step 5: Solve for x
    x = 447,353,926.11/20,729.40
  6. Step 6: Final answer
    x = 21,580.65

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.