Home / 13,948.28-19,249.92-7,978.76

Finding the Fourth Proportional to 13,948.28, 19,249.92 and 7,978.76

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Solution

The fourth proportional to 13,948.28, 19,249.92 and 7,978.76 is: 11,011.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,948.28 : 19,249.92 = 7,978.76 : x
  2. Step 2: Convert to fraction form
    13,948.28/19,249.92 = 7,978.76/x
  3. Step 3: Cross multiply
    13,948.28x = 19,249.92 × 7,978.76
  4. Step 4: Simplify right side
    13,948.28x = 153,590,491.70
  5. Step 5: Solve for x
    x = 153,590,491.70/13,948.28
  6. Step 6: Final answer
    x = 11,011.43

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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.