Home / 20,257.56-27,967.14-15,439.68

Finding the Fourth Proportional to 20,257.56, 27,967.14 and 15,439.68

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Solution

The fourth proportional to 20,257.56, 27,967.14 and 15,439.68 is: 21,315.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.56 : 27,967.14 = 15,439.68 : x
  2. Step 2: Convert to fraction form
    20,257.56/27,967.14 = 15,439.68/x
  3. Step 3: Cross multiply
    20,257.56x = 27,967.14 × 15,439.68
  4. Step 4: Simplify right side
    20,257.56x = 431,803,692.12
  5. Step 5: Solve for x
    x = 431,803,692.12/20,257.56
  6. Step 6: Final answer
    x = 21,315.68

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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.