Home / 20,761,711.80-31,142,567.70-12,116,938.20

Finding the Fourth Proportional to 20,761,711.80, 31,142,567.70 and 12,116,938.20

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Solution

The fourth proportional to 20,761,711.80, 31,142,567.70 and 12,116,938.20 is: 18,175,407.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761,711.80 : 31,142,567.70 = 12,116,938.20 : x
  2. Step 2: Convert to fraction form
    20,761,711.80/31,142,567.70 = 12,116,938.20/x
  3. Step 3: Cross multiply
    20,761,711.80x = 31,142,567.70 × 12,116,938.20
  4. Step 4: Simplify right side
    20,761,711.80x = 377,352,568,210,216.12
  5. Step 5: Solve for x
    x = 377,352,568,210,216.12/20,761,711.80
  6. Step 6: Final answer
    x = 18,175,407.30

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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.