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Finding the Fourth Proportional to 8,728.80, 12,045.77 and 4,749.91

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Solution

The fourth proportional to 8,728.80, 12,045.77 and 4,749.91 is: 6,554.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.80 : 12,045.77 = 4,749.91 : x
  2. Step 2: Convert to fraction form
    8,728.80/12,045.77 = 4,749.91/x
  3. Step 3: Cross multiply
    8,728.80x = 12,045.77 × 4,749.91
  4. Step 4: Simplify right side
    8,728.80x = 57,216,323.38
  5. Step 5: Solve for x
    x = 57,216,323.38/8,728.80
  6. Step 6: Final answer
    x = 6,554.89

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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.