Home / 8,709.11-12,019.59-5,172.32

Finding the Fourth Proportional to 8,709.11, 12,019.59 and 5,172.32

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Solution

The fourth proportional to 8,709.11, 12,019.59 and 5,172.32 is: 7,138.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.11 : 12,019.59 = 5,172.32 : x
  2. Step 2: Convert to fraction form
    8,709.11/12,019.59 = 5,172.32/x
  3. Step 3: Cross multiply
    8,709.11x = 12,019.59 × 5,172.32
  4. Step 4: Simplify right side
    8,709.11x = 62,169,195.80
  5. Step 5: Solve for x
    x = 62,169,195.80/8,709.11
  6. Step 6: Final answer
    x = 7,138.41

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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.