Home / 9,378.48-12,943.88-5,398.85

Finding the Fourth Proportional to 9,378.48, 12,943.88 and 5,398.85

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Solution

The fourth proportional to 9,378.48, 12,943.88 and 5,398.85 is: 7,451.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.48 : 12,943.88 = 5,398.85 : x
  2. Step 2: Convert to fraction form
    9,378.48/12,943.88 = 5,398.85/x
  3. Step 3: Cross multiply
    9,378.48x = 12,943.88 × 5,398.85
  4. Step 4: Simplify right side
    9,378.48x = 69,881,974.82
  5. Step 5: Solve for x
    x = 69,881,974.82/9,378.48
  6. Step 6: Final answer
    x = 7,451.31

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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.