Home / 14,121.64-21,189.42-9,988.21

Finding the Fourth Proportional to 14,121.64, 21,189.42 and 9,988.21

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Solution

The fourth proportional to 14,121.64, 21,189.42 and 9,988.21 is: 14,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.64 : 21,189.42 = 9,988.21 : x
  2. Step 2: Convert to fraction form
    14,121.64/21,189.42 = 9,988.21/x
  3. Step 3: Cross multiply
    14,121.64x = 21,189.42 × 9,988.21
  4. Step 4: Simplify right side
    14,121.64x = 211,644,376.74
  5. Step 5: Solve for x
    x = 211,644,376.74/14,121.64
  6. Step 6: Final answer
    x = 14,987.24

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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.