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Finding the Fourth Proportional to 8,390.88, 11,579.20 and 5,035.52

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Solution

The fourth proportional to 8,390.88, 11,579.20 and 5,035.52 is: 6,948.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.88 : 11,579.20 = 5,035.52 : x
  2. Step 2: Convert to fraction form
    8,390.88/11,579.20 = 5,035.52/x
  3. Step 3: Cross multiply
    8,390.88x = 11,579.20 × 5,035.52
  4. Step 4: Simplify right side
    8,390.88x = 58,307,293.18
  5. Step 5: Solve for x
    x = 58,307,293.18/8,390.88
  6. Step 6: Final answer
    x = 6,948.89

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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.