Home / 10,320.64-15,491.88-6,427.78

Finding the Fourth Proportional to 10,320.64, 15,491.88 and 6,427.78

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Solution

The fourth proportional to 10,320.64, 15,491.88 and 6,427.78 is: 9,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,320.64 : 15,491.88 = 6,427.78 : x
  2. Step 2: Convert to fraction form
    10,320.64/15,491.88 = 6,427.78/x
  3. Step 3: Cross multiply
    10,320.64x = 15,491.88 × 6,427.78
  4. Step 4: Simplify right side
    10,320.64x = 99,578,396.43
  5. Step 5: Solve for x
    x = 99,578,396.43/10,320.64
  6. Step 6: Final answer
    x = 9,648.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.