Home / 28,101.15-42,145.65-12,306.15

Finding the Fourth Proportional to 28,101.15, 42,145.65 and 12,306.15

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Solution

The fourth proportional to 28,101.15, 42,145.65 and 12,306.15 is: 18,456.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.15 : 42,145.65 = 12,306.15 : x
  2. Step 2: Convert to fraction form
    28,101.15/42,145.65 = 12,306.15/x
  3. Step 3: Cross multiply
    28,101.15x = 42,145.65 × 12,306.15
  4. Step 4: Simplify right side
    28,101.15x = 518,650,690.75
  5. Step 5: Solve for x
    x = 518,650,690.75/28,101.15
  6. Step 6: Final answer
    x = 18,456.56

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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.