Home / 20,181.60-30,290.40-11,851.20

Finding the Fourth Proportional to 20,181.60, 30,290.40 and 11,851.20

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Solution

The fourth proportional to 20,181.60, 30,290.40 and 11,851.20 is: 17,787.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,181.60 : 30,290.40 = 11,851.20 : x
  2. Step 2: Convert to fraction form
    20,181.60/30,290.40 = 11,851.20/x
  3. Step 3: Cross multiply
    20,181.60x = 30,290.40 × 11,851.20
  4. Step 4: Simplify right side
    20,181.60x = 358,977,588.48
  5. Step 5: Solve for x
    x = 358,977,588.48/20,181.60
  6. Step 6: Final answer
    x = 17,787.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.