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Finding the Fourth Proportional to 40,427.80, 60,641.70 and 12,725.80

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Solution

The fourth proportional to 40,427.80, 60,641.70 and 12,725.80 is: 19,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,427.80 : 60,641.70 = 12,725.80 : x
  2. Step 2: Convert to fraction form
    40,427.80/60,641.70 = 12,725.80/x
  3. Step 3: Cross multiply
    40,427.80x = 60,641.70 × 12,725.80
  4. Step 4: Simplify right side
    40,427.80x = 771,714,145.86
  5. Step 5: Solve for x
    x = 771,714,145.86/40,427.80
  6. Step 6: Final answer
    x = 19,088.70

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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.