Home / 21,509.20-29,683.53-11,949.80

Finding the Fourth Proportional to 21,509.20, 29,683.53 and 11,949.80

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Solution

The fourth proportional to 21,509.20, 29,683.53 and 11,949.80 is: 16,491.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,509.20 : 29,683.53 = 11,949.80 : x
  2. Step 2: Convert to fraction form
    21,509.20/29,683.53 = 11,949.80/x
  3. Step 3: Cross multiply
    21,509.20x = 29,683.53 × 11,949.80
  4. Step 4: Simplify right side
    21,509.20x = 354,712,246.79
  5. Step 5: Solve for x
    x = 354,712,246.79/21,509.20
  6. Step 6: Final answer
    x = 16,491.19

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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.