Home / 15,220.09-20,986.63-9,835.44

Finding the Fourth Proportional to 15,220.09, 20,986.63 and 9,835.44

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Solution

The fourth proportional to 15,220.09, 20,986.63 and 9,835.44 is: 13,561.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.09 : 20,986.63 = 9,835.44 : x
  2. Step 2: Convert to fraction form
    15,220.09/20,986.63 = 9,835.44/x
  3. Step 3: Cross multiply
    15,220.09x = 20,986.63 × 9,835.44
  4. Step 4: Simplify right side
    15,220.09x = 206,412,740.17
  5. Step 5: Solve for x
    x = 206,412,740.17/15,220.09
  6. Step 6: Final answer
    x = 13,561.86

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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.