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Finding the Fourth Proportional to 14,839.65, 20,478.72 and 8,125.69

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Solution

The fourth proportional to 14,839.65, 20,478.72 and 8,125.69 is: 11,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,839.65 : 20,478.72 = 8,125.69 : x
  2. Step 2: Convert to fraction form
    14,839.65/20,478.72 = 8,125.69/x
  3. Step 3: Cross multiply
    14,839.65x = 20,478.72 × 8,125.69
  4. Step 4: Simplify right side
    14,839.65x = 166,403,638.49
  5. Step 5: Solve for x
    x = 166,403,638.49/14,839.65
  6. Step 6: Final answer
    x = 11,213.45

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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.