Home / 12,645.36-18,981-8,951.76

Finding the Fourth Proportional to 12,645.36, 18,981 and 8,951.76

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Solution

The fourth proportional to 12,645.36, 18,981 and 8,951.76 is: 13,436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.36 : 18,981 = 8,951.76 : x
  2. Step 2: Convert to fraction form
    12,645.36/18,981 = 8,951.76/x
  3. Step 3: Cross multiply
    12,645.36x = 18,981 × 8,951.76
  4. Step 4: Simplify right side
    12,645.36x = 169,913,356.56
  5. Step 5: Solve for x
    x = 169,913,356.56/12,645.36
  6. Step 6: Final answer
    x = 13,436.81

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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.