Home / 21,218.40-29,279.43-12,265.83

Finding the Fourth Proportional to 21,218.40, 29,279.43 and 12,265.83

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Solution

The fourth proportional to 21,218.40, 29,279.43 and 12,265.83 is: 16,925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.40 : 29,279.43 = 12,265.83 : x
  2. Step 2: Convert to fraction form
    21,218.40/29,279.43 = 12,265.83/x
  3. Step 3: Cross multiply
    21,218.40x = 29,279.43 × 12,265.83
  4. Step 4: Simplify right side
    21,218.40x = 359,136,510.88
  5. Step 5: Solve for x
    x = 359,136,510.88/21,218.40
  6. Step 6: Final answer
    x = 16,925.71

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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.