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Finding the Fourth Proportional to 7,358.72, 10,129.92 and 6,470.40

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Solution

The fourth proportional to 7,358.72, 10,129.92 and 6,470.40 is: 8,907.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,358.72 : 10,129.92 = 6,470.40 : x
  2. Step 2: Convert to fraction form
    7,358.72/10,129.92 = 6,470.40/x
  3. Step 3: Cross multiply
    7,358.72x = 10,129.92 × 6,470.40
  4. Step 4: Simplify right side
    7,358.72x = 65,544,634.37
  5. Step 5: Solve for x
    x = 65,544,634.37/7,358.72
  6. Step 6: Final answer
    x = 8,907.07

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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.