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Finding the Fourth Proportional to 60,440.64, 90,663.36 and 18,888

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Solution

The fourth proportional to 60,440.64, 90,663.36 and 18,888 is: 28,332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,440.64 : 90,663.36 = 18,888 : x
  2. Step 2: Convert to fraction form
    60,440.64/90,663.36 = 18,888/x
  3. Step 3: Cross multiply
    60,440.64x = 90,663.36 × 18,888
  4. Step 4: Simplify right side
    60,440.64x = 1,712,449,543.68
  5. Step 5: Solve for x
    x = 1,712,449,543.68/60,440.64
  6. Step 6: Final answer
    x = 28,332.75

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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.