Home / 21,179.43-29,225.48-12,229.79

Finding the Fourth Proportional to 21,179.43, 29,225.48 and 12,229.79

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Solution

The fourth proportional to 21,179.43, 29,225.48 and 12,229.79 is: 16,875.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.43 : 29,225.48 = 12,229.79 : x
  2. Step 2: Convert to fraction form
    21,179.43/29,225.48 = 12,229.79/x
  3. Step 3: Cross multiply
    21,179.43x = 29,225.48 × 12,229.79
  4. Step 4: Simplify right side
    21,179.43x = 357,421,275.77
  5. Step 5: Solve for x
    x = 357,421,275.77/21,179.43
  6. Step 6: Final answer
    x = 16,875.87

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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.