Home / 21,158.08-31,728.91-11,291.97

Finding the Fourth Proportional to 21,158.08, 31,728.91 and 11,291.97

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Solution

The fourth proportional to 21,158.08, 31,728.91 and 11,291.97 is: 16,933.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.08 : 31,728.91 = 11,291.97 : x
  2. Step 2: Convert to fraction form
    21,158.08/31,728.91 = 11,291.97/x
  3. Step 3: Cross multiply
    21,158.08x = 31,728.91 × 11,291.97
  4. Step 4: Simplify right side
    21,158.08x = 358,281,899.85
  5. Step 5: Solve for x
    x = 358,281,899.85/21,158.08
  6. Step 6: Final answer
    x = 16,933.58

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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.