Home / 21,290.32-31,937.66-8,153.72

Finding the Fourth Proportional to 21,290.32, 31,937.66 and 8,153.72

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Solution

The fourth proportional to 21,290.32, 31,937.66 and 8,153.72 is: 12,231.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.32 : 31,937.66 = 8,153.72 : x
  2. Step 2: Convert to fraction form
    21,290.32/31,937.66 = 8,153.72/x
  3. Step 3: Cross multiply
    21,290.32x = 31,937.66 × 8,153.72
  4. Step 4: Simplify right side
    21,290.32x = 260,410,737.10
  5. Step 5: Solve for x
    x = 260,410,737.10/21,290.32
  6. Step 6: Final answer
    x = 12,231.41

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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.