Home / 20,688,504.71-28,550,134.49-11,991,721.88

Finding the Fourth Proportional to 20,688,504.71, 28,550,134.49 and 11,991,721.88

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Solution

The fourth proportional to 20,688,504.71, 28,550,134.49 and 11,991,721.88 is: 16,548,575.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688,504.71 : 28,550,134.49 = 11,991,721.88 : x
  2. Step 2: Convert to fraction form
    20,688,504.71/28,550,134.49 = 11,991,721.88/x
  3. Step 3: Cross multiply
    20,688,504.71x = 28,550,134.49 × 11,991,721.88
  4. Step 4: Simplify right side
    20,688,504.71x = 342,365,272,237,966.38
  5. Step 5: Solve for x
    x = 342,365,272,237,966.38/20,688,504.71
  6. Step 6: Final answer
    x = 16,548,575.02

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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.