Home / 8,486.12-11,712.20-5,129.34

Finding the Fourth Proportional to 8,486.12, 11,712.20 and 5,129.34

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Solution

The fourth proportional to 8,486.12, 11,712.20 and 5,129.34 is: 7,079.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.12 : 11,712.20 = 5,129.34 : x
  2. Step 2: Convert to fraction form
    8,486.12/11,712.20 = 5,129.34/x
  3. Step 3: Cross multiply
    8,486.12x = 11,712.20 × 5,129.34
  4. Step 4: Simplify right side
    8,486.12x = 60,075,830.30
  5. Step 5: Solve for x
    x = 60,075,830.30/8,486.12
  6. Step 6: Final answer
    x = 7,079.31

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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.