Home / 7,140.32-9,853.68-3,953.72

Finding the Fourth Proportional to 7,140.32, 9,853.68 and 3,953.72

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Solution

The fourth proportional to 7,140.32, 9,853.68 and 3,953.72 is: 5,456.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.32 : 9,853.68 = 3,953.72 : x
  2. Step 2: Convert to fraction form
    7,140.32/9,853.68 = 3,953.72/x
  3. Step 3: Cross multiply
    7,140.32x = 9,853.68 × 3,953.72
  4. Step 4: Simplify right side
    7,140.32x = 38,958,675.72
  5. Step 5: Solve for x
    x = 38,958,675.72/7,140.32
  6. Step 6: Final answer
    x = 5,456.15

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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.