Home / 15,491.43-21,378.30-8,417.85

Finding the Fourth Proportional to 15,491.43, 21,378.30 and 8,417.85

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Solution

The fourth proportional to 15,491.43, 21,378.30 and 8,417.85 is: 11,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.43 : 21,378.30 = 8,417.85 : x
  2. Step 2: Convert to fraction form
    15,491.43/21,378.30 = 8,417.85/x
  3. Step 3: Cross multiply
    15,491.43x = 21,378.30 × 8,417.85
  4. Step 4: Simplify right side
    15,491.43x = 179,959,322.66
  5. Step 5: Solve for x
    x = 179,959,322.66/15,491.43
  6. Step 6: Final answer
    x = 11,616.70

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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.