Home / 21,156.94-31,727.19-11,290.83

Finding the Fourth Proportional to 21,156.94, 31,727.19 and 11,290.83

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Solution

The fourth proportional to 21,156.94, 31,727.19 and 11,290.83 is: 16,931.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.94 : 31,727.19 = 11,290.83 : x
  2. Step 2: Convert to fraction form
    21,156.94/31,727.19 = 11,290.83/x
  3. Step 3: Cross multiply
    21,156.94x = 31,727.19 × 11,290.83
  4. Step 4: Simplify right side
    21,156.94x = 358,226,308.67
  5. Step 5: Solve for x
    x = 358,226,308.67/21,156.94
  6. Step 6: Final answer
    x = 16,931.86

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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.