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Finding the Fourth Proportional to 40,191.90, 60,281.90 and 10,611.80

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Solution

The fourth proportional to 40,191.90, 60,281.90 and 10,611.80 is: 15,916.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,191.90 : 60,281.90 = 10,611.80 : x
  2. Step 2: Convert to fraction form
    40,191.90/60,281.90 = 10,611.80/x
  3. Step 3: Cross multiply
    40,191.90x = 60,281.90 × 10,611.80
  4. Step 4: Simplify right side
    40,191.90x = 639,699,466.42
  5. Step 5: Solve for x
    x = 639,699,466.42/40,191.90
  6. Step 6: Final answer
    x = 15,916.13

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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.