Home / 15,078.38-20,810.55-9,110.90

Finding the Fourth Proportional to 15,078.38, 20,810.55 and 9,110.90

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Solution

The fourth proportional to 15,078.38, 20,810.55 and 9,110.90 is: 12,574.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.38 : 20,810.55 = 9,110.90 : x
  2. Step 2: Convert to fraction form
    15,078.38/20,810.55 = 9,110.90/x
  3. Step 3: Cross multiply
    15,078.38x = 20,810.55 × 9,110.90
  4. Step 4: Simplify right side
    15,078.38x = 189,602,735.94
  5. Step 5: Solve for x
    x = 189,602,735.94/15,078.38
  6. Step 6: Final answer
    x = 12,574.48

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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.