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Finding the Fourth Proportional to 40,065.60, 60,103.80 and 13,778.40

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Solution

The fourth proportional to 40,065.60, 60,103.80 and 13,778.40 is: 20,669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,065.60 : 60,103.80 = 13,778.40 : x
  2. Step 2: Convert to fraction form
    40,065.60/60,103.80 = 13,778.40/x
  3. Step 3: Cross multiply
    40,065.60x = 60,103.80 × 13,778.40
  4. Step 4: Simplify right side
    40,065.60x = 828,134,197.92
  5. Step 5: Solve for x
    x = 828,134,197.92/40,065.60
  6. Step 6: Final answer
    x = 20,669.46

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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.