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Finding the Fourth Proportional to 14,961.99, 20,647.20 and 8,247.47

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Solution

The fourth proportional to 14,961.99, 20,647.20 and 8,247.47 is: 11,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,961.99 : 20,647.20 = 8,247.47 : x
  2. Step 2: Convert to fraction form
    14,961.99/20,647.20 = 8,247.47/x
  3. Step 3: Cross multiply
    14,961.99x = 20,647.20 × 8,247.47
  4. Step 4: Simplify right side
    14,961.99x = 170,287,206.42
  5. Step 5: Solve for x
    x = 170,287,206.42/14,961.99
  6. Step 6: Final answer
    x = 11,381.32

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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.