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Finding the Fourth Proportional to 60,389.76, 90,593.28 and 18,840

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Solution

The fourth proportional to 60,389.76, 90,593.28 and 18,840 is: 28,262.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,389.76 : 90,593.28 = 18,840 : x
  2. Step 2: Convert to fraction form
    60,389.76/90,593.28 = 18,840/x
  3. Step 3: Cross multiply
    60,389.76x = 90,593.28 × 18,840
  4. Step 4: Simplify right side
    60,389.76x = 1,706,777,395.20
  5. Step 5: Solve for x
    x = 1,706,777,395.20/60,389.76
  6. Step 6: Final answer
    x = 28,262.70

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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.