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Finding the Fourth Proportional to 20,604,502.80, 30,905,371.80 and 5,458,109.20

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Solution

The fourth proportional to 20,604,502.80, 30,905,371.80 and 5,458,109.20 is: 8,186,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604,502.80 : 30,905,371.80 = 5,458,109.20 : x
  2. Step 2: Convert to fraction form
    20,604,502.80/30,905,371.80 = 5,458,109.20/x
  3. Step 3: Cross multiply
    20,604,502.80x = 30,905,371.80 × 5,458,109.20
  4. Step 4: Simplify right side
    20,604,502.80x = 168,684,894,151,000.56
  5. Step 5: Solve for x
    x = 168,684,894,151,000.56/20,604,502.80
  6. Step 6: Final answer
    x = 8,186,797.60

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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.