Home / 14,121.20-19,478.40-9,091.92

Finding the Fourth Proportional to 14,121.20, 19,478.40 and 9,091.92

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Solution

The fourth proportional to 14,121.20, 19,478.40 and 9,091.92 is: 12,541.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.20 : 19,478.40 = 9,091.92 : x
  2. Step 2: Convert to fraction form
    14,121.20/19,478.40 = 9,091.92/x
  3. Step 3: Cross multiply
    14,121.20x = 19,478.40 × 9,091.92
  4. Step 4: Simplify right side
    14,121.20x = 177,096,054.53
  5. Step 5: Solve for x
    x = 177,096,054.53/14,121.20
  6. Step 6: Final answer
    x = 12,541.15

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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.