Home / 13,981.52-20,965.80-5,214.08

Finding the Fourth Proportional to 13,981.52, 20,965.80 and 5,214.08

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Solution

The fourth proportional to 13,981.52, 20,965.80 and 5,214.08 is: 7,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.52 : 20,965.80 = 5,214.08 : x
  2. Step 2: Convert to fraction form
    13,981.52/20,965.80 = 5,214.08/x
  3. Step 3: Cross multiply
    13,981.52x = 20,965.80 × 5,214.08
  4. Step 4: Simplify right side
    13,981.52x = 109,317,358.46
  5. Step 5: Solve for x
    x = 109,317,358.46/13,981.52
  6. Step 6: Final answer
    x = 7,818.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.