Home / 20,854,186.20-31,281,279.30-18,870,139.80

Finding the Fourth Proportional to 20,854,186.20, 31,281,279.30 and 18,870,139.80

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Solution

The fourth proportional to 20,854,186.20, 31,281,279.30 and 18,870,139.80 is: 28,305,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854,186.20 : 31,281,279.30 = 18,870,139.80 : x
  2. Step 2: Convert to fraction form
    20,854,186.20/31,281,279.30 = 18,870,139.80/x
  3. Step 3: Cross multiply
    20,854,186.20x = 31,281,279.30 × 18,870,139.80
  4. Step 4: Simplify right side
    20,854,186.20x = 590,282,113,513,846.12
  5. Step 5: Solve for x
    x = 590,282,113,513,846.12/20,854,186.20
  6. Step 6: Final answer
    x = 28,305,209.70

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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.