Home / 20,421,505.92-28,181,678.76-11,254,148.70

Finding the Fourth Proportional to 20,421,505.92, 28,181,678.76 and 11,254,148.70

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Solution

The fourth proportional to 20,421,505.92, 28,181,678.76 and 11,254,148.70 is: 15,530,725.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,505.92 : 28,181,678.76 = 11,254,148.70 : x
  2. Step 2: Convert to fraction form
    20,421,505.92/28,181,678.76 = 11,254,148.70/x
  3. Step 3: Cross multiply
    20,421,505.92x = 28,181,678.76 × 11,254,148.70
  4. Step 4: Simplify right side
    20,421,505.92x = 317,160,803,380,671.62
  5. Step 5: Solve for x
    x = 317,160,803,380,671.62/20,421,505.92
  6. Step 6: Final answer
    x = 15,530,725.53

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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.