Home / 21,351.93-29,465.15-11,920.47

Finding the Fourth Proportional to 21,351.93, 29,465.15 and 11,920.47

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Solution

The fourth proportional to 21,351.93, 29,465.15 and 11,920.47 is: 16,449.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.93 : 29,465.15 = 11,920.47 : x
  2. Step 2: Convert to fraction form
    21,351.93/29,465.15 = 11,920.47/x
  3. Step 3: Cross multiply
    21,351.93x = 29,465.15 × 11,920.47
  4. Step 4: Simplify right side
    21,351.93x = 351,238,377.02
  5. Step 5: Solve for x
    x = 351,238,377.02/21,351.93
  6. Step 6: Final answer
    x = 16,449.96

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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.