Home / 15,861.07-21,888.23-8,787.49

Finding the Fourth Proportional to 15,861.07, 21,888.23 and 8,787.49

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Solution

The fourth proportional to 15,861.07, 21,888.23 and 8,787.49 is: 12,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.07 : 21,888.23 = 8,787.49 : x
  2. Step 2: Convert to fraction form
    15,861.07/21,888.23 = 8,787.49/x
  3. Step 3: Cross multiply
    15,861.07x = 21,888.23 × 8,787.49
  4. Step 4: Simplify right side
    15,861.07x = 192,342,503.58
  5. Step 5: Solve for x
    x = 192,342,503.58/15,861.07
  6. Step 6: Final answer
    x = 12,126.71

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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.