Home / 21,399.16-29,528.25-11,838.40

Finding the Fourth Proportional to 21,399.16, 29,528.25 and 11,838.40

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Solution

The fourth proportional to 21,399.16, 29,528.25 and 11,838.40 is: 16,335.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.16 : 29,528.25 = 11,838.40 : x
  2. Step 2: Convert to fraction form
    21,399.16/29,528.25 = 11,838.40/x
  3. Step 3: Cross multiply
    21,399.16x = 29,528.25 × 11,838.40
  4. Step 4: Simplify right side
    21,399.16x = 349,567,234.80
  5. Step 5: Solve for x
    x = 349,567,234.80/21,399.16
  6. Step 6: Final answer
    x = 16,335.56

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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.