Home / 20,864.52-31,303.80-9,178.56

Finding the Fourth Proportional to 20,864.52, 31,303.80 and 9,178.56

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Solution

The fourth proportional to 20,864.52, 31,303.80 and 9,178.56 is: 13,770.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.52 : 31,303.80 = 9,178.56 : x
  2. Step 2: Convert to fraction form
    20,864.52/31,303.80 = 9,178.56/x
  3. Step 3: Cross multiply
    20,864.52x = 31,303.80 × 9,178.56
  4. Step 4: Simplify right side
    20,864.52x = 287,323,806.53
  5. Step 5: Solve for x
    x = 287,323,806.53/20,864.52
  6. Step 6: Final answer
    x = 13,770.93

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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.