Home / 14,121.89-21,189.80-9,988.46

Finding the Fourth Proportional to 14,121.89, 21,189.80 and 9,988.46

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Solution

The fourth proportional to 14,121.89, 21,189.80 and 9,988.46 is: 14,987.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.89 : 21,189.80 = 9,988.46 : x
  2. Step 2: Convert to fraction form
    14,121.89/21,189.80 = 9,988.46/x
  3. Step 3: Cross multiply
    14,121.89x = 21,189.80 × 9,988.46
  4. Step 4: Simplify right side
    14,121.89x = 211,653,469.71
  5. Step 5: Solve for x
    x = 211,653,469.71/14,121.89
  6. Step 6: Final answer
    x = 14,987.62

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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.