Home / 11,491.80-15,868.54-11,120.28

Finding the Fourth Proportional to 11,491.80, 15,868.54 and 11,120.28

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Solution

The fourth proportional to 11,491.80, 15,868.54 and 11,120.28 is: 15,355.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,491.80 : 15,868.54 = 11,120.28 : x
  2. Step 2: Convert to fraction form
    11,491.80/15,868.54 = 11,120.28/x
  3. Step 3: Cross multiply
    11,491.80x = 15,868.54 × 11,120.28
  4. Step 4: Simplify right side
    11,491.80x = 176,462,607.99
  5. Step 5: Solve for x
    x = 176,462,607.99/11,491.80
  6. Step 6: Final answer
    x = 15,355.52

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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.