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Finding the Fourth Proportional to 40,239.40, 60,358.80 and 12,159.40

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Solution

The fourth proportional to 40,239.40, 60,358.80 and 12,159.40 is: 18,239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,239.40 : 60,358.80 = 12,159.40 : x
  2. Step 2: Convert to fraction form
    40,239.40/60,358.80 = 12,159.40/x
  3. Step 3: Cross multiply
    40,239.40x = 60,358.80 × 12,159.40
  4. Step 4: Simplify right side
    40,239.40x = 733,926,792.72
  5. Step 5: Solve for x
    x = 733,926,792.72/40,239.40
  6. Step 6: Final answer
    x = 18,239.01

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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.