Home / 15,090.38-20,826-8,377.40

Finding the Fourth Proportional to 15,090.38, 20,826 and 8,377.40

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Solution

The fourth proportional to 15,090.38, 20,826 and 8,377.40 is: 11,561.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.38 : 20,826 = 8,377.40 : x
  2. Step 2: Convert to fraction form
    15,090.38/20,826 = 8,377.40/x
  3. Step 3: Cross multiply
    15,090.38x = 20,826 × 8,377.40
  4. Step 4: Simplify right side
    15,090.38x = 174,467,732.40
  5. Step 5: Solve for x
    x = 174,467,732.40/15,090.38
  6. Step 6: Final answer
    x = 11,561.52

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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.