Home / 15,399.32-21,251-8,325.74

Finding the Fourth Proportional to 15,399.32, 21,251 and 8,325.74

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Solution

The fourth proportional to 15,399.32, 21,251 and 8,325.74 is: 11,489.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.32 : 21,251 = 8,325.74 : x
  2. Step 2: Convert to fraction form
    15,399.32/21,251 = 8,325.74/x
  3. Step 3: Cross multiply
    15,399.32x = 21,251 × 8,325.74
  4. Step 4: Simplify right side
    15,399.32x = 176,930,300.74
  5. Step 5: Solve for x
    x = 176,930,300.74/15,399.32
  6. Step 6: Final answer
    x = 11,489.49

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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.