Home / 21,518.92-29,704.53-13,559.59

Finding the Fourth Proportional to 21,518.92, 29,704.53 and 13,559.59

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Solution

The fourth proportional to 21,518.92, 29,704.53 and 13,559.59 is: 18,717.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.92 : 29,704.53 = 13,559.59 : x
  2. Step 2: Convert to fraction form
    21,518.92/29,704.53 = 13,559.59/x
  3. Step 3: Cross multiply
    21,518.92x = 29,704.53 × 13,559.59
  4. Step 4: Simplify right side
    21,518.92x = 402,781,247.94
  5. Step 5: Solve for x
    x = 402,781,247.94/21,518.92
  6. Step 6: Final answer
    x = 18,717.54

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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.