Home / 28,189.86-42,264.78-14,139.78

Finding the Fourth Proportional to 28,189.86, 42,264.78 and 14,139.78

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Solution

The fourth proportional to 28,189.86, 42,264.78 and 14,139.78 is: 21,199.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.86 : 42,264.78 = 14,139.78 : x
  2. Step 2: Convert to fraction form
    28,189.86/42,264.78 = 14,139.78/x
  3. Step 3: Cross multiply
    28,189.86x = 42,264.78 × 14,139.78
  4. Step 4: Simplify right side
    28,189.86x = 597,614,690.95
  5. Step 5: Solve for x
    x = 597,614,690.95/28,189.86
  6. Step 6: Final answer
    x = 21,199.63

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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.