Home / 12,888.12-19,332.24-5,491.20

Finding the Fourth Proportional to 12,888.12, 19,332.24 and 5,491.20

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Solution

The fourth proportional to 12,888.12, 19,332.24 and 5,491.20 is: 8,236.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.12 : 19,332.24 = 5,491.20 : x
  2. Step 2: Convert to fraction form
    12,888.12/19,332.24 = 5,491.20/x
  3. Step 3: Cross multiply
    12,888.12x = 19,332.24 × 5,491.20
  4. Step 4: Simplify right side
    12,888.12x = 106,157,196.29
  5. Step 5: Solve for x
    x = 106,157,196.29/12,888.12
  6. Step 6: Final answer
    x = 8,236.83

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1.5x scale

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.