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Finding the Fourth Proportional to 7,871.61, 11,820.57 and 4,916.93

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Solution

The fourth proportional to 7,871.61, 11,820.57 and 4,916.93 is: 7,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.61 : 11,820.57 = 4,916.93 : x
  2. Step 2: Convert to fraction form
    7,871.61/11,820.57 = 4,916.93/x
  3. Step 3: Cross multiply
    7,871.61x = 11,820.57 × 4,916.93
  4. Step 4: Simplify right side
    7,871.61x = 58,120,856.15
  5. Step 5: Solve for x
    x = 58,120,856.15/7,871.61
  6. Step 6: Final answer
    x = 7,383.60

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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.