Home / 52,503.97-78,724.28-20,918.90

Finding the Fourth Proportional to 52,503.97, 78,724.28 and 20,918.90

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Solution

The fourth proportional to 52,503.97, 78,724.28 and 20,918.90 is: 31,365.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,503.97 : 78,724.28 = 20,918.90 : x
  2. Step 2: Convert to fraction form
    52,503.97/78,724.28 = 20,918.90/x
  3. Step 3: Cross multiply
    52,503.97x = 78,724.28 × 20,918.90
  4. Step 4: Simplify right side
    52,503.97x = 1,646,824,842.68
  5. Step 5: Solve for x
    x = 1,646,824,842.68/52,503.97
  6. Step 6: Final answer
    x = 31,365.72

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1.5x scale

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.