Home / 15,174.12-20,889.59-11,390.91

Finding the Fourth Proportional to 15,174.12, 20,889.59 and 11,390.91

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Solution

The fourth proportional to 15,174.12, 20,889.59 and 11,390.91 is: 15,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.12 : 20,889.59 = 11,390.91 : x
  2. Step 2: Convert to fraction form
    15,174.12/20,889.59 = 11,390.91/x
  3. Step 3: Cross multiply
    15,174.12x = 20,889.59 × 11,390.91
  4. Step 4: Simplify right side
    15,174.12x = 237,951,382.67
  5. Step 5: Solve for x
    x = 237,951,382.67/15,174.12
  6. Step 6: Final answer
    x = 15,681.40

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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.