Home / 21,913.56-30,239.76-13,429.80

Finding the Fourth Proportional to 21,913.56, 30,239.76 and 13,429.80

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Solution

The fourth proportional to 21,913.56, 30,239.76 and 13,429.80 is: 18,532.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.56 : 30,239.76 = 13,429.80 : x
  2. Step 2: Convert to fraction form
    21,913.56/30,239.76 = 13,429.80/x
  3. Step 3: Cross multiply
    21,913.56x = 30,239.76 × 13,429.80
  4. Step 4: Simplify right side
    21,913.56x = 406,113,928.85
  5. Step 5: Solve for x
    x = 406,113,928.85/21,913.56
  6. Step 6: Final answer
    x = 18,532.54

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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.