Home / 20,428.50-28,172.61-13,250.94

Finding the Fourth Proportional to 20,428.50, 28,172.61 and 13,250.94

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Solution

The fourth proportional to 20,428.50, 28,172.61 and 13,250.94 is: 18,274.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.50 : 28,172.61 = 13,250.94 : x
  2. Step 2: Convert to fraction form
    20,428.50/28,172.61 = 13,250.94/x
  3. Step 3: Cross multiply
    20,428.50x = 28,172.61 × 13,250.94
  4. Step 4: Simplify right side
    20,428.50x = 373,313,617.58
  5. Step 5: Solve for x
    x = 373,313,617.58/20,428.50
  6. Step 6: Final answer
    x = 18,274.15

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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.