Home / 12,417.86-18,639.03-9,121.70

Finding the Fourth Proportional to 12,417.86, 18,639.03 and 9,121.70

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Solution

The fourth proportional to 12,417.86, 18,639.03 and 9,121.70 is: 13,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.86 : 18,639.03 = 9,121.70 : x
  2. Step 2: Convert to fraction form
    12,417.86/18,639.03 = 9,121.70/x
  3. Step 3: Cross multiply
    12,417.86x = 18,639.03 × 9,121.70
  4. Step 4: Simplify right side
    12,417.86x = 170,019,639.95
  5. Step 5: Solve for x
    x = 170,019,639.95/12,417.86
  6. Step 6: Final answer
    x = 13,691.54

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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.