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Finding the Fourth Proportional to 40,811.68, 61,218.48 and 13,109.92

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Solution

The fourth proportional to 40,811.68, 61,218.48 and 13,109.92 is: 19,665.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,811.68 : 61,218.48 = 13,109.92 : x
  2. Step 2: Convert to fraction form
    40,811.68/61,218.48 = 13,109.92/x
  3. Step 3: Cross multiply
    40,811.68x = 61,218.48 × 13,109.92
  4. Step 4: Simplify right side
    40,811.68x = 802,569,375.32
  5. Step 5: Solve for x
    x = 802,569,375.32/40,811.68
  6. Step 6: Final answer
    x = 19,665.19

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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.