Home / 20,928.66-28,881.42-12,545.16

Finding the Fourth Proportional to 20,928.66, 28,881.42 and 12,545.16

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Solution

The fourth proportional to 20,928.66, 28,881.42 and 12,545.16 is: 17,312.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.66 : 28,881.42 = 12,545.16 : x
  2. Step 2: Convert to fraction form
    20,928.66/28,881.42 = 12,545.16/x
  3. Step 3: Cross multiply
    20,928.66x = 28,881.42 × 12,545.16
  4. Step 4: Simplify right side
    20,928.66x = 362,322,034.93
  5. Step 5: Solve for x
    x = 362,322,034.93/20,928.66
  6. Step 6: Final answer
    x = 17,312.24

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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.