Home / 18,721.56-25,814.76-12,756.72

Finding the Fourth Proportional to 18,721.56, 25,814.76 and 12,756.72

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Solution

The fourth proportional to 18,721.56, 25,814.76 and 12,756.72 is: 17,589.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.56 : 25,814.76 = 12,756.72 : x
  2. Step 2: Convert to fraction form
    18,721.56/25,814.76 = 12,756.72/x
  3. Step 3: Cross multiply
    18,721.56x = 25,814.76 × 12,756.72
  4. Step 4: Simplify right side
    18,721.56x = 329,311,665.19
  5. Step 5: Solve for x
    x = 329,311,665.19/18,721.56
  6. Step 6: Final answer
    x = 17,589.97

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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.