Home / 20,862,979.20-31,294,468.80-13,210,228.80

Finding the Fourth Proportional to 20,862,979.20, 31,294,468.80 and 13,210,228.80

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Solution

The fourth proportional to 20,862,979.20, 31,294,468.80 and 13,210,228.80 is: 19,815,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862,979.20 : 31,294,468.80 = 13,210,228.80 : x
  2. Step 2: Convert to fraction form
    20,862,979.20/31,294,468.80 = 13,210,228.80/x
  3. Step 3: Cross multiply
    20,862,979.20x = 31,294,468.80 × 13,210,228.80
  4. Step 4: Simplify right side
    20,862,979.20x = 413,407,093,022,461.50
  5. Step 5: Solve for x
    x = 413,407,093,022,461.50/20,862,979.20
  6. Step 6: Final answer
    x = 19,815,343.20

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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.