Home / 20,081.13-30,123.15-5,289.93

Finding the Fourth Proportional to 20,081.13, 30,123.15 and 5,289.93

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Solution

The fourth proportional to 20,081.13, 30,123.15 and 5,289.93 is: 7,935.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.13 : 30,123.15 = 5,289.93 : x
  2. Step 2: Convert to fraction form
    20,081.13/30,123.15 = 5,289.93/x
  3. Step 3: Cross multiply
    20,081.13x = 30,123.15 × 5,289.93
  4. Step 4: Simplify right side
    20,081.13x = 159,349,354.88
  5. Step 5: Solve for x
    x = 159,349,354.88/20,081.13
  6. Step 6: Final answer
    x = 7,935.28

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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.