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Finding the Fourth Proportional to 14,290.82, 19,722.28 and 7,917.68

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Solution

The fourth proportional to 14,290.82, 19,722.28 and 7,917.68 is: 10,926.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.82 : 19,722.28 = 7,917.68 : x
  2. Step 2: Convert to fraction form
    14,290.82/19,722.28 = 7,917.68/x
  3. Step 3: Cross multiply
    14,290.82x = 19,722.28 × 7,917.68
  4. Step 4: Simplify right side
    14,290.82x = 156,154,701.91
  5. Step 5: Solve for x
    x = 156,154,701.91/14,290.82
  6. Step 6: Final answer
    x = 10,926.92

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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.