Home / 21,079.68-29,090.16-11,648.40

Finding the Fourth Proportional to 21,079.68, 29,090.16 and 11,648.40

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Solution

The fourth proportional to 21,079.68, 29,090.16 and 11,648.40 is: 16,074.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.68 : 29,090.16 = 11,648.40 : x
  2. Step 2: Convert to fraction form
    21,079.68/29,090.16 = 11,648.40/x
  3. Step 3: Cross multiply
    21,079.68x = 29,090.16 × 11,648.40
  4. Step 4: Simplify right side
    21,079.68x = 338,853,819.74
  5. Step 5: Solve for x
    x = 338,853,819.74/21,079.68
  6. Step 6: Final answer
    x = 16,074.90

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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.