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Finding the Fourth Proportional to 15,860.56, 21,888.32 and 8,787.04

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Solution

The fourth proportional to 15,860.56, 21,888.32 and 8,787.04 is: 12,126.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,860.56 : 21,888.32 = 8,787.04 : x
  2. Step 2: Convert to fraction form
    15,860.56/21,888.32 = 8,787.04/x
  3. Step 3: Cross multiply
    15,860.56x = 21,888.32 × 8,787.04
  4. Step 4: Simplify right side
    15,860.56x = 192,333,543.37
  5. Step 5: Solve for x
    x = 192,333,543.37/15,860.56
  6. Step 6: Final answer
    x = 12,126.53

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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.