Home / 21,528.12-29,709.46-13,031.79

Finding the Fourth Proportional to 21,528.12, 29,709.46 and 13,031.79

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Solution

The fourth proportional to 21,528.12, 29,709.46 and 13,031.79 is: 17,984.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,528.12 : 29,709.46 = 13,031.79 : x
  2. Step 2: Convert to fraction form
    21,528.12/29,709.46 = 13,031.79/x
  3. Step 3: Cross multiply
    21,528.12x = 29,709.46 × 13,031.79
  4. Step 4: Simplify right side
    21,528.12x = 387,167,443.73
  5. Step 5: Solve for x
    x = 387,167,443.73/21,528.12
  6. Step 6: Final answer
    x = 17,984.27

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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.