Home / 12,345,020.80-18,442,446.99-7,991,605.55

Finding the Fourth Proportional to 12,345,020.80, 18,442,446.99 and 7,991,605.55

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Solution

The fourth proportional to 12,345,020.80, 18,442,446.99 and 7,991,605.55 is: 11,938,802.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345,020.80 : 18,442,446.99 = 7,991,605.55 : x
  2. Step 2: Convert to fraction form
    12,345,020.80/18,442,446.99 = 7,991,605.55/x
  3. Step 3: Cross multiply
    12,345,020.80x = 18,442,446.99 × 7,991,605.55
  4. Step 4: Simplify right side
    12,345,020.80x = 147,384,761,720,864.78
  5. Step 5: Solve for x
    x = 147,384,761,720,864.78/12,345,020.80
  6. Step 6: Final answer
    x = 11,938,802.22

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.