Home / 42,777.12-64,169.28-11,187.12

Finding the Fourth Proportional to 42,777.12, 64,169.28 and 11,187.12

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Solution

The fourth proportional to 42,777.12, 64,169.28 and 11,187.12 is: 16,781.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,777.12 : 64,169.28 = 11,187.12 : x
  2. Step 2: Convert to fraction form
    42,777.12/64,169.28 = 11,187.12/x
  3. Step 3: Cross multiply
    42,777.12x = 64,169.28 × 11,187.12
  4. Step 4: Simplify right side
    42,777.12x = 717,869,435.67
  5. Step 5: Solve for x
    x = 717,869,435.67/42,777.12
  6. Step 6: Final answer
    x = 16,781.62

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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.