Home / 9,891.49-13,649.85-5,415.13

Finding the Fourth Proportional to 9,891.49, 13,649.85 and 5,415.13

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Solution

The fourth proportional to 9,891.49, 13,649.85 and 5,415.13 is: 7,472.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.49 : 13,649.85 = 5,415.13 : x
  2. Step 2: Convert to fraction form
    9,891.49/13,649.85 = 5,415.13/x
  3. Step 3: Cross multiply
    9,891.49x = 13,649.85 × 5,415.13
  4. Step 4: Simplify right side
    9,891.49x = 73,915,685.15
  5. Step 5: Solve for x
    x = 73,915,685.15/9,891.49
  6. Step 6: Final answer
    x = 7,472.65

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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.