Home / 20,349.81-28,077.32-13,181.91

Finding the Fourth Proportional to 20,349.81, 28,077.32 and 13,181.91

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Solution

The fourth proportional to 20,349.81, 28,077.32 and 13,181.91 is: 18,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,349.81 : 28,077.32 = 13,181.91 : x
  2. Step 2: Convert to fraction form
    20,349.81/28,077.32 = 13,181.91/x
  3. Step 3: Cross multiply
    20,349.81x = 28,077.32 × 13,181.91
  4. Step 4: Simplify right side
    20,349.81x = 370,112,851.31
  5. Step 5: Solve for x
    x = 370,112,851.31/20,349.81
  6. Step 6: Final answer
    x = 18,187.54

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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.