Home / 15,391.72-21,239.04-9,425.08

Finding the Fourth Proportional to 15,391.72, 21,239.04 and 9,425.08

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Solution

The fourth proportional to 15,391.72, 21,239.04 and 9,425.08 is: 13,005.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.72 : 21,239.04 = 9,425.08 : x
  2. Step 2: Convert to fraction form
    15,391.72/21,239.04 = 9,425.08/x
  3. Step 3: Cross multiply
    15,391.72x = 21,239.04 × 9,425.08
  4. Step 4: Simplify right side
    15,391.72x = 200,179,651.12
  5. Step 5: Solve for x
    x = 200,179,651.12/15,391.72
  6. Step 6: Final answer
    x = 13,005.67

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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.