Home / 21,215.08-31,816.14-10,115.92

Finding the Fourth Proportional to 21,215.08, 31,816.14 and 10,115.92

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Solution

The fourth proportional to 21,215.08, 31,816.14 and 10,115.92 is: 15,170.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.08 : 31,816.14 = 10,115.92 : x
  2. Step 2: Convert to fraction form
    21,215.08/31,816.14 = 10,115.92/x
  3. Step 3: Cross multiply
    21,215.08x = 31,816.14 × 10,115.92
  4. Step 4: Simplify right side
    21,215.08x = 321,849,526.95
  5. Step 5: Solve for x
    x = 321,849,526.95/21,215.08
  6. Step 6: Final answer
    x = 15,170.79

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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.