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Finding the Fourth Proportional to 15,626.65, 21,565.15 and 8,912.90

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Solution

The fourth proportional to 15,626.65, 21,565.15 and 8,912.90 is: 12,300.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,626.65 : 21,565.15 = 8,912.90 : x
  2. Step 2: Convert to fraction form
    15,626.65/21,565.15 = 8,912.90/x
  3. Step 3: Cross multiply
    15,626.65x = 21,565.15 × 8,912.90
  4. Step 4: Simplify right side
    15,626.65x = 192,207,975.12
  5. Step 5: Solve for x
    x = 192,207,975.12/15,626.65
  6. Step 6: Final answer
    x = 12,300.01

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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.