Home / 8,128.64-12,182.16-2,929.52

Finding the Fourth Proportional to 8,128.64, 12,182.16 and 2,929.52

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Solution

The fourth proportional to 8,128.64, 12,182.16 and 2,929.52 is: 4,390.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.64 : 12,182.16 = 2,929.52 : x
  2. Step 2: Convert to fraction form
    8,128.64/12,182.16 = 2,929.52/x
  3. Step 3: Cross multiply
    8,128.64x = 12,182.16 × 2,929.52
  4. Step 4: Simplify right side
    8,128.64x = 35,687,881.36
  5. Step 5: Solve for x
    x = 35,687,881.36/8,128.64
  6. Step 6: Final answer
    x = 4,390.39

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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.