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Finding the Fourth Proportional to 40,651.40, 60,961.95 and 13,989.94

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Solution

The fourth proportional to 40,651.40, 60,961.95 and 13,989.94 is: 20,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,651.40 : 60,961.95 = 13,989.94 : x
  2. Step 2: Convert to fraction form
    40,651.40/60,961.95 = 13,989.94/x
  3. Step 3: Cross multiply
    40,651.40x = 60,961.95 × 13,989.94
  4. Step 4: Simplify right side
    40,651.40x = 852,854,041.83
  5. Step 5: Solve for x
    x = 852,854,041.83/40,651.40
  6. Step 6: Final answer
    x = 20,979.70

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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.