Home / 15,369.12-21,209.13-9,000.09

Finding the Fourth Proportional to 15,369.12, 21,209.13 and 9,000.09

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Solution

The fourth proportional to 15,369.12, 21,209.13 and 9,000.09 is: 12,419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.12 : 21,209.13 = 9,000.09 : x
  2. Step 2: Convert to fraction form
    15,369.12/21,209.13 = 9,000.09/x
  3. Step 3: Cross multiply
    15,369.12x = 21,209.13 × 9,000.09
  4. Step 4: Simplify right side
    15,369.12x = 190,884,078.82
  5. Step 5: Solve for x
    x = 190,884,078.82/15,369.12
  6. Step 6: Final answer
    x = 12,419.97

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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.