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Finding the Fourth Proportional to 8,728.74, 12,045.58 and 4,749.85

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Solution

The fourth proportional to 8,728.74, 12,045.58 and 4,749.85 is: 6,554.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.74 : 12,045.58 = 4,749.85 : x
  2. Step 2: Convert to fraction form
    8,728.74/12,045.58 = 4,749.85/x
  3. Step 3: Cross multiply
    8,728.74x = 12,045.58 × 4,749.85
  4. Step 4: Simplify right side
    8,728.74x = 57,214,746.79
  5. Step 5: Solve for x
    x = 57,214,746.79/8,728.74
  6. Step 6: Final answer
    x = 6,554.76

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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.