Home / 21,213.08-29,279.40-12,265.76

Finding the Fourth Proportional to 21,213.08, 29,279.40 and 12,265.76

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Solution

The fourth proportional to 21,213.08, 29,279.40 and 12,265.76 is: 16,929.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.08 : 29,279.40 = 12,265.76 : x
  2. Step 2: Convert to fraction form
    21,213.08/29,279.40 = 12,265.76/x
  3. Step 3: Cross multiply
    21,213.08x = 29,279.40 × 12,265.76
  4. Step 4: Simplify right side
    21,213.08x = 359,134,093.34
  5. Step 5: Solve for x
    x = 359,134,093.34/21,213.08
  6. Step 6: Final answer
    x = 16,929.84

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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.