Home / 13,426.68-20,139.90-7,918.32

Finding the Fourth Proportional to 13,426.68, 20,139.90 and 7,918.32

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Solution

The fourth proportional to 13,426.68, 20,139.90 and 7,918.32 is: 11,877.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,426.68 : 20,139.90 = 7,918.32 : x
  2. Step 2: Convert to fraction form
    13,426.68/20,139.90 = 7,918.32/x
  3. Step 3: Cross multiply
    13,426.68x = 20,139.90 × 7,918.32
  4. Step 4: Simplify right side
    13,426.68x = 159,474,172.97
  5. Step 5: Solve for x
    x = 159,474,172.97/13,426.68
  6. Step 6: Final answer
    x = 11,877.41

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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.