Home / 8,712.60-12,021.30-5,176.68

Finding the Fourth Proportional to 8,712.60, 12,021.30 and 5,176.68

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Solution

The fourth proportional to 8,712.60, 12,021.30 and 5,176.68 is: 7,142.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.60 : 12,021.30 = 5,176.68 : x
  2. Step 2: Convert to fraction form
    8,712.60/12,021.30 = 5,176.68/x
  3. Step 3: Cross multiply
    8,712.60x = 12,021.30 × 5,176.68
  4. Step 4: Simplify right side
    8,712.60x = 62,230,423.28
  5. Step 5: Solve for x
    x = 62,230,423.28/8,712.60
  6. Step 6: Final answer
    x = 7,142.58

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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.