Home / 28,100.28-38,809.68-21,803.01

Finding the Fourth Proportional to 28,100.28, 38,809.68 and 21,803.01

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Solution

The fourth proportional to 28,100.28, 38,809.68 and 21,803.01 is: 30,112.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.28 : 38,809.68 = 21,803.01 : x
  2. Step 2: Convert to fraction form
    28,100.28/38,809.68 = 21,803.01/x
  3. Step 3: Cross multiply
    28,100.28x = 38,809.68 × 21,803.01
  4. Step 4: Simplify right side
    28,100.28x = 846,167,841.14
  5. Step 5: Solve for x
    x = 846,167,841.14/28,100.28
  6. Step 6: Final answer
    x = 30,112.43

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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.