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Finding the Fourth Proportional to 40,486.80, 60,730.20 and 20,803.80

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Solution

The fourth proportional to 40,486.80, 60,730.20 and 20,803.80 is: 31,205.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,486.80 : 60,730.20 = 20,803.80 : x
  2. Step 2: Convert to fraction form
    40,486.80/60,730.20 = 20,803.80/x
  3. Step 3: Cross multiply
    40,486.80x = 60,730.20 × 20,803.80
  4. Step 4: Simplify right side
    40,486.80x = 1,263,418,934.76
  5. Step 5: Solve for x
    x = 1,263,418,934.76/40,486.80
  6. Step 6: Final answer
    x = 31,205.70

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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.