Home / 9,117.28-12,581.84-5,139.36

Finding the Fourth Proportional to 9,117.28, 12,581.84 and 5,139.36

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Solution

The fourth proportional to 9,117.28, 12,581.84 and 5,139.36 is: 7,092.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.28 : 12,581.84 = 5,139.36 : x
  2. Step 2: Convert to fraction form
    9,117.28/12,581.84 = 5,139.36/x
  3. Step 3: Cross multiply
    9,117.28x = 12,581.84 × 5,139.36
  4. Step 4: Simplify right side
    9,117.28x = 64,662,605.22
  5. Step 5: Solve for x
    x = 64,662,605.22/9,117.28
  6. Step 6: Final answer
    x = 7,092.31

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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.