Home / 20,912.05-28,851.59-13,362.80

Finding the Fourth Proportional to 20,912.05, 28,851.59 and 13,362.80

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Solution

The fourth proportional to 20,912.05, 28,851.59 and 13,362.80 is: 18,436.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.05 : 28,851.59 = 13,362.80 : x
  2. Step 2: Convert to fraction form
    20,912.05/28,851.59 = 13,362.80/x
  3. Step 3: Cross multiply
    20,912.05x = 28,851.59 × 13,362.80
  4. Step 4: Simplify right side
    20,912.05x = 385,537,916.00
  5. Step 5: Solve for x
    x = 385,537,916.00/20,912.05
  6. Step 6: Final answer
    x = 18,436.16

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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.