Home / 20,873.12-28,808.60-15,828.84

Finding the Fourth Proportional to 20,873.12, 28,808.60 and 15,828.84

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Solution

The fourth proportional to 20,873.12, 28,808.60 and 15,828.84 is: 21,846.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.12 : 28,808.60 = 15,828.84 : x
  2. Step 2: Convert to fraction form
    20,873.12/28,808.60 = 15,828.84/x
  3. Step 3: Cross multiply
    20,873.12x = 28,808.60 × 15,828.84
  4. Step 4: Simplify right side
    20,873.12x = 456,006,720.02
  5. Step 5: Solve for x
    x = 456,006,720.02/20,873.12
  6. Step 6: Final answer
    x = 21,846.60

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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.