Home / 21,212.32-31,788.39-15,621.82

Finding the Fourth Proportional to 21,212.32, 31,788.39 and 15,621.82

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Solution

The fourth proportional to 21,212.32, 31,788.39 and 15,621.82 is: 23,410.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.32 : 31,788.39 = 15,621.82 : x
  2. Step 2: Convert to fraction form
    21,212.32/31,788.39 = 15,621.82/x
  3. Step 3: Cross multiply
    21,212.32x = 31,788.39 × 15,621.82
  4. Step 4: Simplify right side
    21,212.32x = 496,592,506.67
  5. Step 5: Solve for x
    x = 496,592,506.67/21,212.32
  6. Step 6: Final answer
    x = 23,410.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.