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Finding the Fourth Proportional to 8,916.71, 12,311.08 and 7,969.46

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Solution

The fourth proportional to 8,916.71, 12,311.08 and 7,969.46 is: 11,003.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.71 : 12,311.08 = 7,969.46 : x
  2. Step 2: Convert to fraction form
    8,916.71/12,311.08 = 7,969.46/x
  3. Step 3: Cross multiply
    8,916.71x = 12,311.08 × 7,969.46
  4. Step 4: Simplify right side
    8,916.71x = 98,112,670.47
  5. Step 5: Solve for x
    x = 98,112,670.47/8,916.71
  6. Step 6: Final answer
    x = 11,003.23

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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.