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Finding the Fourth Proportional to 8,916.71, 12,305.76 and 4,938.20

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Solution

The fourth proportional to 8,916.71, 12,305.76 and 4,938.20 is: 6,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.71 : 12,305.76 = 4,938.20 : x
  2. Step 2: Convert to fraction form
    8,916.71/12,305.76 = 4,938.20/x
  3. Step 3: Cross multiply
    8,916.71x = 12,305.76 × 4,938.20
  4. Step 4: Simplify right side
    8,916.71x = 60,768,242.50
  5. Step 5: Solve for x
    x = 60,768,242.50/8,916.71
  6. Step 6: Final answer
    x = 6,815.10

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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.