Home / 42,405.80-63,549.84-18,677.76

Finding the Fourth Proportional to 42,405.80, 63,549.84 and 18,677.76

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Solution

The fourth proportional to 42,405.80, 63,549.84 and 18,677.76 is: 27,990.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,405.80 : 63,549.84 = 18,677.76 : x
  2. Step 2: Convert to fraction form
    42,405.80/63,549.84 = 18,677.76/x
  3. Step 3: Cross multiply
    42,405.80x = 63,549.84 × 18,677.76
  4. Step 4: Simplify right side
    42,405.80x = 1,186,968,659.56
  5. Step 5: Solve for x
    x = 1,186,968,659.56/42,405.80
  6. Step 6: Final answer
    x = 27,990.72

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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.