Home / 13,147.16-18,143.15-7,178.97

Finding the Fourth Proportional to 13,147.16, 18,143.15 and 7,178.97

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Solution

The fourth proportional to 13,147.16, 18,143.15 and 7,178.97 is: 9,907.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.16 : 18,143.15 = 7,178.97 : x
  2. Step 2: Convert to fraction form
    13,147.16/18,143.15 = 7,178.97/x
  3. Step 3: Cross multiply
    13,147.16x = 18,143.15 × 7,178.97
  4. Step 4: Simplify right side
    13,147.16x = 130,249,093.66
  5. Step 5: Solve for x
    x = 130,249,093.66/13,147.16
  6. Step 6: Final answer
    x = 9,907.01

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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.