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Finding the Fourth Proportional to 15,916.33, 21,957.06 and 9,539.88

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Solution

The fourth proportional to 15,916.33, 21,957.06 and 9,539.88 is: 13,160.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.33 : 21,957.06 = 9,539.88 : x
  2. Step 2: Convert to fraction form
    15,916.33/21,957.06 = 9,539.88/x
  3. Step 3: Cross multiply
    15,916.33x = 21,957.06 × 9,539.88
  4. Step 4: Simplify right side
    15,916.33x = 209,467,717.55
  5. Step 5: Solve for x
    x = 209,467,717.55/15,916.33
  6. Step 6: Final answer
    x = 13,160.55

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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.