Home / 21,942.40-32,913.60-13,172.80

Finding the Fourth Proportional to 21,942.40, 32,913.60 and 13,172.80

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Solution

The fourth proportional to 21,942.40, 32,913.60 and 13,172.80 is: 19,759.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.40 : 32,913.60 = 13,172.80 : x
  2. Step 2: Convert to fraction form
    21,942.40/32,913.60 = 13,172.80/x
  3. Step 3: Cross multiply
    21,942.40x = 32,913.60 × 13,172.80
  4. Step 4: Simplify right side
    21,942.40x = 433,564,270.08
  5. Step 5: Solve for x
    x = 433,564,270.08/21,942.40
  6. Step 6: Final answer
    x = 19,759.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.