Home / 13,145.53-18,141.27-7,177.66

Finding the Fourth Proportional to 13,145.53, 18,141.27 and 7,177.66

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Solution

The fourth proportional to 13,145.53, 18,141.27 and 7,177.66 is: 9,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.53 : 18,141.27 = 7,177.66 : x
  2. Step 2: Convert to fraction form
    13,145.53/18,141.27 = 7,177.66/x
  3. Step 3: Cross multiply
    13,145.53x = 18,141.27 × 7,177.66
  4. Step 4: Simplify right side
    13,145.53x = 130,211,741.43
  5. Step 5: Solve for x
    x = 130,211,741.43/13,145.53
  6. Step 6: Final answer
    x = 9,905.40

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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.