Home / 30,998.61-42,777.15-18,248.86

Finding the Fourth Proportional to 30,998.61, 42,777.15 and 18,248.86

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Solution

The fourth proportional to 30,998.61, 42,777.15 and 18,248.86 is: 25,182.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998.61 : 42,777.15 = 18,248.86 : x
  2. Step 2: Convert to fraction form
    30,998.61/42,777.15 = 18,248.86/x
  3. Step 3: Cross multiply
    30,998.61x = 42,777.15 × 18,248.86
  4. Step 4: Simplify right side
    30,998.61x = 780,634,206.59
  5. Step 5: Solve for x
    x = 780,634,206.59/30,998.61
  6. Step 6: Final answer
    x = 25,182.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.