Home / 13,146.54-18,141.75-7,178.10

Finding the Fourth Proportional to 13,146.54, 18,141.75 and 7,178.10

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Solution

The fourth proportional to 13,146.54, 18,141.75 and 7,178.10 is: 9,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.54 : 18,141.75 = 7,178.10 : x
  2. Step 2: Convert to fraction form
    13,146.54/18,141.75 = 7,178.10/x
  3. Step 3: Cross multiply
    13,146.54x = 18,141.75 × 7,178.10
  4. Step 4: Simplify right side
    13,146.54x = 130,223,295.68
  5. Step 5: Solve for x
    x = 130,223,295.68/13,146.54
  6. Step 6: Final answer
    x = 9,905.52

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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.