Home / 21,158.94-31,730.20-11,292.84

Finding the Fourth Proportional to 21,158.94, 31,730.20 and 11,292.84

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Solution

The fourth proportional to 21,158.94, 31,730.20 and 11,292.84 is: 16,934.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.94 : 31,730.20 = 11,292.84 : x
  2. Step 2: Convert to fraction form
    21,158.94/31,730.20 = 11,292.84/x
  3. Step 3: Cross multiply
    21,158.94x = 31,730.20 × 11,292.84
  4. Step 4: Simplify right side
    21,158.94x = 358,324,071.77
  5. Step 5: Solve for x
    x = 358,324,071.77/21,158.94
  6. Step 6: Final answer
    x = 16,934.88

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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.