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Finding the Fourth Proportional to 15,674.32, 21,630.48 and 8,600.80

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Solution

The fourth proportional to 15,674.32, 21,630.48 and 8,600.80 is: 11,869.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.32 : 21,630.48 = 8,600.80 : x
  2. Step 2: Convert to fraction form
    15,674.32/21,630.48 = 8,600.80/x
  3. Step 3: Cross multiply
    15,674.32x = 21,630.48 × 8,600.80
  4. Step 4: Simplify right side
    15,674.32x = 186,039,432.38
  5. Step 5: Solve for x
    x = 186,039,432.38/15,674.32
  6. Step 6: Final answer
    x = 11,869.06

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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.