Home / 21,125.31-31,719.12-11,783.58

Finding the Fourth Proportional to 21,125.31, 31,719.12 and 11,783.58

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Solution

The fourth proportional to 21,125.31, 31,719.12 and 11,783.58 is: 17,692.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.31 : 31,719.12 = 11,783.58 : x
  2. Step 2: Convert to fraction form
    21,125.31/31,719.12 = 11,783.58/x
  3. Step 3: Cross multiply
    21,125.31x = 31,719.12 × 11,783.58
  4. Step 4: Simplify right side
    21,125.31x = 373,764,788.05
  5. Step 5: Solve for x
    x = 373,764,788.05/21,125.31
  6. Step 6: Final answer
    x = 17,692.75

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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.