Home / 13,145.03-18,140.57-7,177.15

Finding the Fourth Proportional to 13,145.03, 18,140.57 and 7,177.15

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Solution

The fourth proportional to 13,145.03, 18,140.57 and 7,177.15 is: 9,904.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.03 : 18,140.57 = 7,177.15 : x
  2. Step 2: Convert to fraction form
    13,145.03/18,140.57 = 7,177.15/x
  3. Step 3: Cross multiply
    13,145.03x = 18,140.57 × 7,177.15
  4. Step 4: Simplify right side
    13,145.03x = 130,197,666.61
  5. Step 5: Solve for x
    x = 130,197,666.61/13,145.03
  6. Step 6: Final answer
    x = 9,904.71

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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.