Home / 45,331.60-68,019.68-20,389.28

Finding the Fourth Proportional to 45,331.60, 68,019.68 and 20,389.28

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Solution

The fourth proportional to 45,331.60, 68,019.68 and 20,389.28 is: 30,593.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,331.60 : 68,019.68 = 20,389.28 : x
  2. Step 2: Convert to fraction form
    45,331.60/68,019.68 = 20,389.28/x
  3. Step 3: Cross multiply
    45,331.60x = 68,019.68 × 20,389.28
  4. Step 4: Simplify right side
    45,331.60x = 1,386,872,301.03
  5. Step 5: Solve for x
    x = 1,386,872,301.03/45,331.60
  6. Step 6: Final answer
    x = 30,593.94

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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.