Home / 13,145.12-18,140.70-7,177.25

Finding the Fourth Proportional to 13,145.12, 18,140.70 and 7,177.25

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Solution

The fourth proportional to 13,145.12, 18,140.70 and 7,177.25 is: 9,904.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.12 : 18,140.70 = 7,177.25 : x
  2. Step 2: Convert to fraction form
    13,145.12/18,140.70 = 7,177.25/x
  3. Step 3: Cross multiply
    13,145.12x = 18,140.70 × 7,177.25
  4. Step 4: Simplify right side
    13,145.12x = 130,200,289.11
  5. Step 5: Solve for x
    x = 130,200,289.11/13,145.12
  6. Step 6: Final answer
    x = 9,904.84

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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.