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Finding the Fourth Proportional to 7,952, 10,974.72 and 4,640

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Solution

The fourth proportional to 7,952, 10,974.72 and 4,640 is: 6,403.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,952 : 10,974.72 = 4,640 : x
  2. Step 2: Convert to fraction form
    7,952/10,974.72 = 4,640/x
  3. Step 3: Cross multiply
    7,952x = 10,974.72 × 4,640
  4. Step 4: Simplify right side
    7,952x = 50,922,700.80
  5. Step 5: Solve for x
    x = 50,922,700.80/7,952
  6. Step 6: Final answer
    x = 6,403.76

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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.