Home / 21,615.12-32,431.32-11,742.84

Finding the Fourth Proportional to 21,615.12, 32,431.32 and 11,742.84

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Solution

The fourth proportional to 21,615.12, 32,431.32 and 11,742.84 is: 17,618.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.12 : 32,431.32 = 11,742.84 : x
  2. Step 2: Convert to fraction form
    21,615.12/32,431.32 = 11,742.84/x
  3. Step 3: Cross multiply
    21,615.12x = 32,431.32 × 11,742.84
  4. Step 4: Simplify right side
    21,615.12x = 380,835,801.75
  5. Step 5: Solve for x
    x = 380,835,801.75/21,615.12
  6. Step 6: Final answer
    x = 17,618.95

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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.