Home / 21,034.60-29,031.78-15,389.80

Finding the Fourth Proportional to 21,034.60, 29,031.78 and 15,389.80

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Solution

The fourth proportional to 21,034.60, 29,031.78 and 15,389.80 is: 21,240.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.60 : 29,031.78 = 15,389.80 : x
  2. Step 2: Convert to fraction form
    21,034.60/29,031.78 = 15,389.80/x
  3. Step 3: Cross multiply
    21,034.60x = 29,031.78 × 15,389.80
  4. Step 4: Simplify right side
    21,034.60x = 446,793,287.84
  5. Step 5: Solve for x
    x = 446,793,287.84/21,034.60
  6. Step 6: Final answer
    x = 21,240.87

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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.