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Finding the Fourth Proportional to 40,940.40, 61,381.80 and 15,970.80

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Solution

The fourth proportional to 40,940.40, 61,381.80 and 15,970.80 is: 23,944.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,940.40 : 61,381.80 = 15,970.80 : x
  2. Step 2: Convert to fraction form
    40,940.40/61,381.80 = 15,970.80/x
  3. Step 3: Cross multiply
    40,940.40x = 61,381.80 × 15,970.80
  4. Step 4: Simplify right side
    40,940.40x = 980,316,451.44
  5. Step 5: Solve for x
    x = 980,316,451.44/40,940.40
  6. Step 6: Final answer
    x = 23,944.97

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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.