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Finding the Fourth Proportional to 7,920.08, 10,925.70 and 7,357.28

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Solution

The fourth proportional to 7,920.08, 10,925.70 and 7,357.28 is: 10,149.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.08 : 10,925.70 = 7,357.28 : x
  2. Step 2: Convert to fraction form
    7,920.08/10,925.70 = 7,357.28/x
  3. Step 3: Cross multiply
    7,920.08x = 10,925.70 × 7,357.28
  4. Step 4: Simplify right side
    7,920.08x = 80,383,434.10
  5. Step 5: Solve for x
    x = 80,383,434.10/7,920.08
  6. Step 6: Final answer
    x = 10,149.32

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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.