Home / 21,325.14-31,991.47-7,281.88

Finding the Fourth Proportional to 21,325.14, 31,991.47 and 7,281.88

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Solution

The fourth proportional to 21,325.14, 31,991.47 and 7,281.88 is: 10,924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.14 : 31,991.47 = 7,281.88 : x
  2. Step 2: Convert to fraction form
    21,325.14/31,991.47 = 7,281.88/x
  3. Step 3: Cross multiply
    21,325.14x = 31,991.47 × 7,281.88
  4. Step 4: Simplify right side
    21,325.14x = 232,957,983.88
  5. Step 5: Solve for x
    x = 232,957,983.88/21,325.14
  6. Step 6: Final answer
    x = 10,924.10

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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.