Home / 21,631.14-29,855.61-13,668.30

Finding the Fourth Proportional to 21,631.14, 29,855.61 and 13,668.30

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Solution

The fourth proportional to 21,631.14, 29,855.61 and 13,668.30 is: 18,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.14 : 29,855.61 = 13,668.30 : x
  2. Step 2: Convert to fraction form
    21,631.14/29,855.61 = 13,668.30/x
  3. Step 3: Cross multiply
    21,631.14x = 29,855.61 × 13,668.30
  4. Step 4: Simplify right side
    21,631.14x = 408,075,434.16
  5. Step 5: Solve for x
    x = 408,075,434.16/21,631.14
  6. Step 6: Final answer
    x = 18,865.18

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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.