Home / 8,538.90-11,778.84-5,389.62

Finding the Fourth Proportional to 8,538.90, 11,778.84 and 5,389.62

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Solution

The fourth proportional to 8,538.90, 11,778.84 and 5,389.62 is: 7,434.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.90 : 11,778.84 = 5,389.62 : x
  2. Step 2: Convert to fraction form
    8,538.90/11,778.84 = 5,389.62/x
  3. Step 3: Cross multiply
    8,538.90x = 11,778.84 × 5,389.62
  4. Step 4: Simplify right side
    8,538.90x = 63,483,471.64
  5. Step 5: Solve for x
    x = 63,483,471.64/8,538.90
  6. Step 6: Final answer
    x = 7,434.62

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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.