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Finding the Fourth Proportional to 8,316.84, 12,475.12 and 4,812.12

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Solution

The fourth proportional to 8,316.84, 12,475.12 and 4,812.12 is: 7,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,316.84 : 12,475.12 = 4,812.12 : x
  2. Step 2: Convert to fraction form
    8,316.84/12,475.12 = 4,812.12/x
  3. Step 3: Cross multiply
    8,316.84x = 12,475.12 × 4,812.12
  4. Step 4: Simplify right side
    8,316.84x = 60,031,774.45
  5. Step 5: Solve for x
    x = 60,031,774.45/8,316.84
  6. Step 6: Final answer
    x = 7,218.10

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1.5x scale

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.