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Finding the Fourth Proportional to 40,405.76, 60,618.17 and 12,703.76

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Solution

The fourth proportional to 40,405.76, 60,618.17 and 12,703.76 is: 19,058.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,405.76 : 60,618.17 = 12,703.76 : x
  2. Step 2: Convert to fraction form
    40,405.76/60,618.17 = 12,703.76/x
  3. Step 3: Cross multiply
    40,405.76x = 60,618.17 × 12,703.76
  4. Step 4: Simplify right side
    40,405.76x = 770,078,683.32
  5. Step 5: Solve for x
    x = 770,078,683.32/40,405.76
  6. Step 6: Final answer
    x = 19,058.64

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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.