Home / 12,438.36-17,159.70-8,239.32

Finding the Fourth Proportional to 12,438.36, 17,159.70 and 8,239.32

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Solution

The fourth proportional to 12,438.36, 17,159.70 and 8,239.32 is: 11,366.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.36 : 17,159.70 = 8,239.32 : x
  2. Step 2: Convert to fraction form
    12,438.36/17,159.70 = 8,239.32/x
  3. Step 3: Cross multiply
    12,438.36x = 17,159.70 × 8,239.32
  4. Step 4: Simplify right side
    12,438.36x = 141,384,259.40
  5. Step 5: Solve for x
    x = 141,384,259.40/12,438.36
  6. Step 6: Final answer
    x = 11,366.79

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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.