Home / 28,163.74-38,824.56-21,437.65

Finding the Fourth Proportional to 28,163.74, 38,824.56 and 21,437.65

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Solution

The fourth proportional to 28,163.74, 38,824.56 and 21,437.65 is: 29,552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.74 : 38,824.56 = 21,437.65 : x
  2. Step 2: Convert to fraction form
    28,163.74/38,824.56 = 21,437.65/x
  3. Step 3: Cross multiply
    28,163.74x = 38,824.56 × 21,437.65
  4. Step 4: Simplify right side
    28,163.74x = 832,307,328.68
  5. Step 5: Solve for x
    x = 832,307,328.68/28,163.74
  6. Step 6: Final answer
    x = 29,552.44

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Double scale
Find fourth proportional to 28,164.74, 38,825.94 and 21,438.65
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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.