Home / 15,089.77-20,824.91-9,121.69

Finding the Fourth Proportional to 15,089.77, 20,824.91 and 9,121.69

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Solution

The fourth proportional to 15,089.77, 20,824.91 and 9,121.69 is: 12,588.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.77 : 20,824.91 = 9,121.69 : x
  2. Step 2: Convert to fraction form
    15,089.77/20,824.91 = 9,121.69/x
  3. Step 3: Cross multiply
    15,089.77x = 20,824.91 × 9,121.69
  4. Step 4: Simplify right side
    15,089.77x = 189,958,373.30
  5. Step 5: Solve for x
    x = 189,958,373.30/15,089.77
  6. Step 6: Final answer
    x = 12,588.55

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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.