Home / 15,628.22-21,561.61-8,909.01

Finding the Fourth Proportional to 15,628.22, 21,561.61 and 8,909.01

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Solution

The fourth proportional to 15,628.22, 21,561.61 and 8,909.01 is: 12,291.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,628.22 : 21,561.61 = 8,909.01 : x
  2. Step 2: Convert to fraction form
    15,628.22/21,561.61 = 8,909.01/x
  3. Step 3: Cross multiply
    15,628.22x = 21,561.61 × 8,909.01
  4. Step 4: Simplify right side
    15,628.22x = 192,092,469.03
  5. Step 5: Solve for x
    x = 192,092,469.03/15,628.22
  6. Step 6: Final answer
    x = 12,291.38

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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.