Home / 21,017.91-31,526.88-19,966.80

Finding the Fourth Proportional to 21,017.91, 31,526.88 and 19,966.80

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Solution

The fourth proportional to 21,017.91, 31,526.88 and 19,966.80 is: 29,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.91 : 31,526.88 = 19,966.80 : x
  2. Step 2: Convert to fraction form
    21,017.91/31,526.88 = 19,966.80/x
  3. Step 3: Cross multiply
    21,017.91x = 31,526.88 × 19,966.80
  4. Step 4: Simplify right side
    21,017.91x = 629,490,907.58
  5. Step 5: Solve for x
    x = 629,490,907.58/21,017.91
  6. Step 6: Final answer
    x = 29,950.21

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Similar ratio
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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.