Home / 13,143.36-18,138.15-7,175.08

Finding the Fourth Proportional to 13,143.36, 18,138.15 and 7,175.08

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Solution

The fourth proportional to 13,143.36, 18,138.15 and 7,175.08 is: 9,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.36 : 18,138.15 = 7,175.08 : x
  2. Step 2: Convert to fraction form
    13,143.36/18,138.15 = 7,175.08/x
  3. Step 3: Cross multiply
    13,143.36x = 18,138.15 × 7,175.08
  4. Step 4: Simplify right side
    13,143.36x = 130,142,643.63
  5. Step 5: Solve for x
    x = 130,142,643.63/13,143.36
  6. Step 6: Final answer
    x = 9,901.78

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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.