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Finding the Fourth Proportional to 15,223.76, 20,995.16 and 12,679.98

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Solution

The fourth proportional to 15,223.76, 20,995.16 and 12,679.98 is: 17,487.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,223.76 : 20,995.16 = 12,679.98 : x
  2. Step 2: Convert to fraction form
    15,223.76/20,995.16 = 12,679.98/x
  3. Step 3: Cross multiply
    15,223.76x = 20,995.16 × 12,679.98
  4. Step 4: Simplify right side
    15,223.76x = 266,218,208.90
  5. Step 5: Solve for x
    x = 266,218,208.90/15,223.76
  6. Step 6: Final answer
    x = 17,487.02

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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.