Home / 18,631.47-25,722.92-12,820.58

Finding the Fourth Proportional to 18,631.47, 25,722.92 and 12,820.58

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Solution

The fourth proportional to 18,631.47, 25,722.92 and 12,820.58 is: 17,700.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.47 : 25,722.92 = 12,820.58 : x
  2. Step 2: Convert to fraction form
    18,631.47/25,722.92 = 12,820.58/x
  3. Step 3: Cross multiply
    18,631.47x = 25,722.92 × 12,820.58
  4. Step 4: Simplify right side
    18,631.47x = 329,782,560.98
  5. Step 5: Solve for x
    x = 329,782,560.98/18,631.47
  6. Step 6: Final answer
    x = 17,700.30

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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.