Home / 21,120.96-31,642.32-15,263.04

Finding the Fourth Proportional to 21,120.96, 31,642.32 and 15,263.04

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Solution

The fourth proportional to 21,120.96, 31,642.32 and 15,263.04 is: 22,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.96 : 31,642.32 = 15,263.04 : x
  2. Step 2: Convert to fraction form
    21,120.96/31,642.32 = 15,263.04/x
  3. Step 3: Cross multiply
    21,120.96x = 31,642.32 × 15,263.04
  4. Step 4: Simplify right side
    21,120.96x = 482,957,995.85
  5. Step 5: Solve for x
    x = 482,957,995.85/21,120.96
  6. Step 6: Final answer
    x = 22,866.29

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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.