Home / 21,335.40-29,435.96-11,902.12

Finding the Fourth Proportional to 21,335.40, 29,435.96 and 11,902.12

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Solution

The fourth proportional to 21,335.40, 29,435.96 and 11,902.12 is: 16,421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.40 : 29,435.96 = 11,902.12 : x
  2. Step 2: Convert to fraction form
    21,335.40/29,435.96 = 11,902.12/x
  3. Step 3: Cross multiply
    21,335.40x = 29,435.96 × 11,902.12
  4. Step 4: Simplify right side
    21,335.40x = 350,350,328.24
  5. Step 5: Solve for x
    x = 350,350,328.24/21,335.40
  6. Step 6: Final answer
    x = 16,421.08

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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.