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Finding the Fourth Proportional to 7,064.66, 9,749.68 and 3,920.85

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Solution

The fourth proportional to 7,064.66, 9,749.68 and 3,920.85 is: 5,411.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,064.66 : 9,749.68 = 3,920.85 : x
  2. Step 2: Convert to fraction form
    7,064.66/9,749.68 = 3,920.85/x
  3. Step 3: Cross multiply
    7,064.66x = 9,749.68 × 3,920.85
  4. Step 4: Simplify right side
    7,064.66x = 38,226,984.08
  5. Step 5: Solve for x
    x = 38,226,984.08/7,064.66
  6. Step 6: Final answer
    x = 5,411.02

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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.