Home / 20,686.14-28,516.29-16,143.69

Finding the Fourth Proportional to 20,686.14, 28,516.29 and 16,143.69

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Solution

The fourth proportional to 20,686.14, 28,516.29 and 16,143.69 is: 22,254.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.14 : 28,516.29 = 16,143.69 : x
  2. Step 2: Convert to fraction form
    20,686.14/28,516.29 = 16,143.69/x
  3. Step 3: Cross multiply
    20,686.14x = 28,516.29 × 16,143.69
  4. Step 4: Simplify right side
    20,686.14x = 460,358,145.71
  5. Step 5: Solve for x
    x = 460,358,145.71/20,686.14
  6. Step 6: Final answer
    x = 22,254.42

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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.