Home / 13,145.78-18,141.45-7,177.52

Finding the Fourth Proportional to 13,145.78, 18,141.45 and 7,177.52

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Solution

The fourth proportional to 13,145.78, 18,141.45 and 7,177.52 is: 9,905.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.78 : 18,141.45 = 7,177.52 : x
  2. Step 2: Convert to fraction form
    13,145.78/18,141.45 = 7,177.52/x
  3. Step 3: Cross multiply
    13,145.78x = 18,141.45 × 7,177.52
  4. Step 4: Simplify right side
    13,145.78x = 130,210,620.20
  5. Step 5: Solve for x
    x = 130,210,620.20/13,145.78
  6. Step 6: Final answer
    x = 9,905.13

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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.