Home / 20,721,617.60-31,069,984.80-10,643,921.60

Finding the Fourth Proportional to 20,721,617.60, 31,069,984.80 and 10,643,921.60

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Solution

The fourth proportional to 20,721,617.60, 31,069,984.80 and 10,643,921.60 is: 15,959,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721,617.60 : 31,069,984.80 = 10,643,921.60 : x
  2. Step 2: Convert to fraction form
    20,721,617.60/31,069,984.80 = 10,643,921.60/x
  3. Step 3: Cross multiply
    20,721,617.60x = 31,069,984.80 × 10,643,921.60
  4. Step 4: Simplify right side
    20,721,617.60x = 330,706,482,324,391.69
  5. Step 5: Solve for x
    x = 330,706,482,324,391.69/20,721,617.60
  6. Step 6: Final answer
    x = 15,959,491.61

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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.