Home / 18,707,830.80-28,061,746.20-13,287,132.60

Finding the Fourth Proportional to 18,707,830.80, 28,061,746.20 and 13,287,132.60

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Solution

The fourth proportional to 18,707,830.80, 28,061,746.20 and 13,287,132.60 is: 19,930,698.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707,830.80 : 28,061,746.20 = 13,287,132.60 : x
  2. Step 2: Convert to fraction form
    18,707,830.80/28,061,746.20 = 13,287,132.60/x
  3. Step 3: Cross multiply
    18,707,830.80x = 28,061,746.20 × 13,287,132.60
  4. Step 4: Simplify right side
    18,707,830.80x = 372,860,142,746,946.12
  5. Step 5: Solve for x
    x = 372,860,142,746,946.12/18,707,830.80
  6. Step 6: Final answer
    x = 19,930,698.90

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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.