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Finding the Fourth Proportional to 8,712.10, 12,024.60 and 5,357.80

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Solution

The fourth proportional to 8,712.10, 12,024.60 and 5,357.80 is: 7,394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.10 : 12,024.60 = 5,357.80 : x
  2. Step 2: Convert to fraction form
    8,712.10/12,024.60 = 5,357.80/x
  3. Step 3: Cross multiply
    8,712.10x = 12,024.60 × 5,357.80
  4. Step 4: Simplify right side
    8,712.10x = 64,425,401.88
  5. Step 5: Solve for x
    x = 64,425,401.88/8,712.10
  6. Step 6: Final answer
    x = 7,394.93

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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.