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Finding the Fourth Proportional to 15,916.40, 21,960.80 and 9,544.96

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Solution

The fourth proportional to 15,916.40, 21,960.80 and 9,544.96 is: 13,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.40 : 21,960.80 = 9,544.96 : x
  2. Step 2: Convert to fraction form
    15,916.40/21,960.80 = 9,544.96/x
  3. Step 3: Cross multiply
    15,916.40x = 21,960.80 × 9,544.96
  4. Step 4: Simplify right side
    15,916.40x = 209,614,957.57
  5. Step 5: Solve for x
    x = 209,614,957.57/15,916.40
  6. Step 6: Final answer
    x = 13,169.75

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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.