Home / 21,178.91-29,230.40-11,750.51

Finding the Fourth Proportional to 21,178.91, 29,230.40 and 11,750.51

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Solution

The fourth proportional to 21,178.91, 29,230.40 and 11,750.51 is: 16,217.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.91 : 29,230.40 = 11,750.51 : x
  2. Step 2: Convert to fraction form
    21,178.91/29,230.40 = 11,750.51/x
  3. Step 3: Cross multiply
    21,178.91x = 29,230.40 × 11,750.51
  4. Step 4: Simplify right side
    21,178.91x = 343,472,107.50
  5. Step 5: Solve for x
    x = 343,472,107.50/21,178.91
  6. Step 6: Final answer
    x = 16,217.65

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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.