Home / 22,811.93-31,478.22-13,121.70

Finding the Fourth Proportional to 22,811.93, 31,478.22 and 13,121.70

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Solution

The fourth proportional to 22,811.93, 31,478.22 and 13,121.70 is: 18,106.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,811.93 : 31,478.22 = 13,121.70 : x
  2. Step 2: Convert to fraction form
    22,811.93/31,478.22 = 13,121.70/x
  3. Step 3: Cross multiply
    22,811.93x = 31,478.22 × 13,121.70
  4. Step 4: Simplify right side
    22,811.93x = 413,047,641.33
  5. Step 5: Solve for x
    x = 413,047,641.33/22,811.93
  6. Step 6: Final answer
    x = 18,106.65

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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.