Home / 15,491.18-21,378.03-8,417.72

Finding the Fourth Proportional to 15,491.18, 21,378.03 and 8,417.72

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Solution

The fourth proportional to 15,491.18, 21,378.03 and 8,417.72 is: 11,616.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.18 : 21,378.03 = 8,417.72 : x
  2. Step 2: Convert to fraction form
    15,491.18/21,378.03 = 8,417.72/x
  3. Step 3: Cross multiply
    15,491.18x = 21,378.03 × 8,417.72
  4. Step 4: Simplify right side
    15,491.18x = 179,954,292.57
  5. Step 5: Solve for x
    x = 179,954,292.57/15,491.18
  6. Step 6: Final answer
    x = 11,616.56

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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.