Home / 15,399.51-21,251.22-8,325.91

Finding the Fourth Proportional to 15,399.51, 21,251.22 and 8,325.91

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Solution

The fourth proportional to 15,399.51, 21,251.22 and 8,325.91 is: 11,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.51 : 21,251.22 = 8,325.91 : x
  2. Step 2: Convert to fraction form
    15,399.51/21,251.22 = 8,325.91/x
  3. Step 3: Cross multiply
    15,399.51x = 21,251.22 × 8,325.91
  4. Step 4: Simplify right side
    15,399.51x = 176,935,745.11
  5. Step 5: Solve for x
    x = 176,935,745.11/15,399.51
  6. Step 6: Final answer
    x = 11,489.70

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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.