Home / 15,491.31-21,377.58-8,417.76

Finding the Fourth Proportional to 15,491.31, 21,377.58 and 8,417.76

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Solution

The fourth proportional to 15,491.31, 21,377.58 and 8,417.76 is: 11,616.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.31 : 21,377.58 = 8,417.76 : x
  2. Step 2: Convert to fraction form
    15,491.31/21,377.58 = 8,417.76/x
  3. Step 3: Cross multiply
    15,491.31x = 21,377.58 × 8,417.76
  4. Step 4: Simplify right side
    15,491.31x = 179,951,337.82
  5. Step 5: Solve for x
    x = 179,951,337.82/15,491.31
  6. Step 6: Final answer
    x = 11,616.28

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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.