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Finding the Fourth Proportional to 40,587.40, 60,890.70 and 12,885.40

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Solution

The fourth proportional to 40,587.40, 60,890.70 and 12,885.40 is: 19,331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,587.40 : 60,890.70 = 12,885.40 : x
  2. Step 2: Convert to fraction form
    40,587.40/60,890.70 = 12,885.40/x
  3. Step 3: Cross multiply
    40,587.40x = 60,890.70 × 12,885.40
  4. Step 4: Simplify right side
    40,587.40x = 784,601,025.78
  5. Step 5: Solve for x
    x = 784,601,025.78/40,587.40
  6. Step 6: Final answer
    x = 19,331.15

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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.