Home / 21,253.80-31,858.68-7,209.12

Finding the Fourth Proportional to 21,253.80, 31,858.68 and 7,209.12

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Solution

The fourth proportional to 21,253.80, 31,858.68 and 7,209.12 is: 10,806.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.80 : 31,858.68 = 7,209.12 : x
  2. Step 2: Convert to fraction form
    21,253.80/31,858.68 = 7,209.12/x
  3. Step 3: Cross multiply
    21,253.80x = 31,858.68 × 7,209.12
  4. Step 4: Simplify right side
    21,253.80x = 229,673,047.16
  5. Step 5: Solve for x
    x = 229,673,047.16/21,253.80
  6. Step 6: Final answer
    x = 10,806.21

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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.