Home / 20,884.48-28,824.20-15,840.26

Finding the Fourth Proportional to 20,884.48, 28,824.20 and 15,840.26

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Solution

The fourth proportional to 20,884.48, 28,824.20 and 15,840.26 is: 21,862.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.48 : 28,824.20 = 15,840.26 : x
  2. Step 2: Convert to fraction form
    20,884.48/28,824.20 = 15,840.26/x
  3. Step 3: Cross multiply
    20,884.48x = 28,824.20 × 15,840.26
  4. Step 4: Simplify right side
    20,884.48x = 456,582,855.56
  5. Step 5: Solve for x
    x = 456,582,855.56/20,884.48
  6. Step 6: Final answer
    x = 21,862.30

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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.