Home / 21,509.40-29,680.29-11,949.24

Finding the Fourth Proportional to 21,509.40, 29,680.29 and 11,949.24

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Solution

The fourth proportional to 21,509.40, 29,680.29 and 11,949.24 is: 16,488.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,509.40 : 29,680.29 = 11,949.24 : x
  2. Step 2: Convert to fraction form
    21,509.40/29,680.29 = 11,949.24/x
  3. Step 3: Cross multiply
    21,509.40x = 29,680.29 × 11,949.24
  4. Step 4: Simplify right side
    21,509.40x = 354,656,908.48
  5. Step 5: Solve for x
    x = 354,656,908.48/21,509.40
  6. Step 6: Final answer
    x = 16,488.46

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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.