Home / 5,128.06-7,691.76-1,430.81

Finding the Fourth Proportional to 5,128.06, 7,691.76 and 1,430.81

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Solution

The fourth proportional to 5,128.06, 7,691.76 and 1,430.81 is: 2,146.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.06 : 7,691.76 = 1,430.81 : x
  2. Step 2: Convert to fraction form
    5,128.06/7,691.76 = 1,430.81/x
  3. Step 3: Cross multiply
    5,128.06x = 7,691.76 × 1,430.81
  4. Step 4: Simplify right side
    5,128.06x = 11,005,447.13
  5. Step 5: Solve for x
    x = 11,005,447.13/5,128.06
  6. Step 6: Final answer
    x = 2,146.12

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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.