Home / 7,018.83-9,689.64-5,128.29

Finding the Fourth Proportional to 7,018.83, 9,689.64 and 5,128.29

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Solution

The fourth proportional to 7,018.83, 9,689.64 and 5,128.29 is: 7,079.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,018.83 : 9,689.64 = 5,128.29 : x
  2. Step 2: Convert to fraction form
    7,018.83/9,689.64 = 5,128.29/x
  3. Step 3: Cross multiply
    7,018.83x = 9,689.64 × 5,128.29
  4. Step 4: Simplify right side
    7,018.83x = 49,691,283.92
  5. Step 5: Solve for x
    x = 49,691,283.92/7,018.83
  6. Step 6: Final answer
    x = 7,079.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.