Home / 15,398.12-21,238.50-15,167.72

Finding the Fourth Proportional to 15,398.12, 21,238.50 and 15,167.72

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Solution

The fourth proportional to 15,398.12, 21,238.50 and 15,167.72 is: 20,920.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.12 : 21,238.50 = 15,167.72 : x
  2. Step 2: Convert to fraction form
    15,398.12/21,238.50 = 15,167.72/x
  3. Step 3: Cross multiply
    15,398.12x = 21,238.50 × 15,167.72
  4. Step 4: Simplify right side
    15,398.12x = 322,139,621.22
  5. Step 5: Solve for x
    x = 322,139,621.22/15,398.12
  6. Step 6: Final answer
    x = 20,920.71

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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.