Home / 20,967.28-31,442.80-8,484.12

Finding the Fourth Proportional to 20,967.28, 31,442.80 and 8,484.12

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Solution

The fourth proportional to 20,967.28, 31,442.80 and 8,484.12 is: 12,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.28 : 31,442.80 = 8,484.12 : x
  2. Step 2: Convert to fraction form
    20,967.28/31,442.80 = 8,484.12/x
  3. Step 3: Cross multiply
    20,967.28x = 31,442.80 × 8,484.12
  4. Step 4: Simplify right side
    20,967.28x = 266,764,488.34
  5. Step 5: Solve for x
    x = 266,764,488.34/20,967.28
  6. Step 6: Final answer
    x = 12,722.89

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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.