Home / 18,719,720.80-28,079,581.20-12,555,005.20

Finding the Fourth Proportional to 18,719,720.80, 28,079,581.20 and 12,555,005.20

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Solution

The fourth proportional to 18,719,720.80, 28,079,581.20 and 12,555,005.20 is: 18,832,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719,720.80 : 28,079,581.20 = 12,555,005.20 : x
  2. Step 2: Convert to fraction form
    18,719,720.80/28,079,581.20 = 12,555,005.20/x
  3. Step 3: Cross multiply
    18,719,720.80x = 28,079,581.20 × 12,555,005.20
  4. Step 4: Simplify right side
    18,719,720.80x = 352,539,287,979,822.19
  5. Step 5: Solve for x
    x = 352,539,287,979,822.19/18,719,720.80
  6. Step 6: Final answer
    x = 18,832,507.80

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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.