Home / 28,121.52-38,839.08-21,824.32

Finding the Fourth Proportional to 28,121.52, 38,839.08 and 21,824.32

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Solution

The fourth proportional to 28,121.52, 38,839.08 and 21,824.32 is: 30,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.52 : 38,839.08 = 21,824.32 : x
  2. Step 2: Convert to fraction form
    28,121.52/38,839.08 = 21,824.32/x
  3. Step 3: Cross multiply
    28,121.52x = 38,839.08 × 21,824.32
  4. Step 4: Simplify right side
    28,121.52x = 847,636,510.43
  5. Step 5: Solve for x
    x = 847,636,510.43/28,121.52
  6. Step 6: Final answer
    x = 30,141.92

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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.