Home / 13,428.60-20,126.70-6,851.40

Finding the Fourth Proportional to 13,428.60, 20,126.70 and 6,851.40

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Solution

The fourth proportional to 13,428.60, 20,126.70 and 6,851.40 is: 10,268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.60 : 20,126.70 = 6,851.40 : x
  2. Step 2: Convert to fraction form
    13,428.60/20,126.70 = 6,851.40/x
  3. Step 3: Cross multiply
    13,428.60x = 20,126.70 × 6,851.40
  4. Step 4: Simplify right side
    13,428.60x = 137,896,072.38
  5. Step 5: Solve for x
    x = 137,896,072.38/13,428.60
  6. Step 6: Final answer
    x = 10,268.83

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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.