Home / 8,090.87-12,117.80-5,129.17

Finding the Fourth Proportional to 8,090.87, 12,117.80 and 5,129.17

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Solution

The fourth proportional to 8,090.87, 12,117.80 and 5,129.17 is: 7,682.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,090.87 : 12,117.80 = 5,129.17 : x
  2. Step 2: Convert to fraction form
    8,090.87/12,117.80 = 5,129.17/x
  3. Step 3: Cross multiply
    8,090.87x = 12,117.80 × 5,129.17
  4. Step 4: Simplify right side
    8,090.87x = 62,154,238.75
  5. Step 5: Solve for x
    x = 62,154,238.75/8,090.87
  6. Step 6: Final answer
    x = 7,682.03

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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.