Home / 20,781,619.10-31,172,428.65-6,403,406.30

Finding the Fourth Proportional to 20,781,619.10, 31,172,428.65 and 6,403,406.30

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Solution

The fourth proportional to 20,781,619.10, 31,172,428.65 and 6,403,406.30 is: 9,605,109.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,619.10 : 31,172,428.65 = 6,403,406.30 : x
  2. Step 2: Convert to fraction form
    20,781,619.10/31,172,428.65 = 6,403,406.30/x
  3. Step 3: Cross multiply
    20,781,619.10x = 31,172,428.65 × 6,403,406.30
  4. Step 4: Simplify right side
    20,781,619.10x = 199,609,726,003,710.47
  5. Step 5: Solve for x
    x = 199,609,726,003,710.47/20,781,619.10
  6. Step 6: Final answer
    x = 9,605,109.45

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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.