Home / 20,887.13-31,325.88-12,456.01

Finding the Fourth Proportional to 20,887.13, 31,325.88 and 12,456.01

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Solution

The fourth proportional to 20,887.13, 31,325.88 and 12,456.01 is: 18,681.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.13 : 31,325.88 = 12,456.01 : x
  2. Step 2: Convert to fraction form
    20,887.13/31,325.88 = 12,456.01/x
  3. Step 3: Cross multiply
    20,887.13x = 31,325.88 × 12,456.01
  4. Step 4: Simplify right side
    20,887.13x = 390,195,474.54
  5. Step 5: Solve for x
    x = 390,195,474.54/20,887.13
  6. Step 6: Final answer
    x = 18,681.14

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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.