Home / 20,491.76-30,700.56-9,407.72

Finding the Fourth Proportional to 20,491.76, 30,700.56 and 9,407.72

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Solution

The fourth proportional to 20,491.76, 30,700.56 and 9,407.72 is: 14,094.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.76 : 30,700.56 = 9,407.72 : x
  2. Step 2: Convert to fraction form
    20,491.76/30,700.56 = 9,407.72/x
  3. Step 3: Cross multiply
    20,491.76x = 30,700.56 × 9,407.72
  4. Step 4: Simplify right side
    20,491.76x = 288,822,272.32
  5. Step 5: Solve for x
    x = 288,822,272.32/20,491.76
  6. Step 6: Final answer
    x = 14,094.56

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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.