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Finding the Fourth Proportional to 15,146.88, 20,908.08 and 8,776.32

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Solution

The fourth proportional to 15,146.88, 20,908.08 and 8,776.32 is: 12,114.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,146.88 : 20,908.08 = 8,776.32 : x
  2. Step 2: Convert to fraction form
    15,146.88/20,908.08 = 8,776.32/x
  3. Step 3: Cross multiply
    15,146.88x = 20,908.08 × 8,776.32
  4. Step 4: Simplify right side
    15,146.88x = 183,496,000.67
  5. Step 5: Solve for x
    x = 183,496,000.67/15,146.88
  6. Step 6: Final answer
    x = 12,114.44

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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.