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Finding the Fourth Proportional to 8,750.56, 12,074.16 and 5,215

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Solution

The fourth proportional to 8,750.56, 12,074.16 and 5,215 is: 7,195.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,750.56 : 12,074.16 = 5,215 : x
  2. Step 2: Convert to fraction form
    8,750.56/12,074.16 = 5,215/x
  3. Step 3: Cross multiply
    8,750.56x = 12,074.16 × 5,215
  4. Step 4: Simplify right side
    8,750.56x = 62,966,744.40
  5. Step 5: Solve for x
    x = 62,966,744.40/8,750.56
  6. Step 6: Final answer
    x = 7,195.74

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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.