Home / 20,886.40-28,834.32-14,207.68

Finding the Fourth Proportional to 20,886.40, 28,834.32 and 14,207.68

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Solution

The fourth proportional to 20,886.40, 28,834.32 and 14,207.68 is: 19,614.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.40 : 28,834.32 = 14,207.68 : x
  2. Step 2: Convert to fraction form
    20,886.40/28,834.32 = 14,207.68/x
  3. Step 3: Cross multiply
    20,886.40x = 28,834.32 × 14,207.68
  4. Step 4: Simplify right side
    20,886.40x = 409,668,791.58
  5. Step 5: Solve for x
    x = 409,668,791.58/20,886.40
  6. Step 6: Final answer
    x = 19,614.14

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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.