Home / 13,170.40-18,174.51-7,505.39

Finding the Fourth Proportional to 13,170.40, 18,174.51 and 7,505.39

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Solution

The fourth proportional to 13,170.40, 18,174.51 and 7,505.39 is: 10,357.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.40 : 18,174.51 = 7,505.39 : x
  2. Step 2: Convert to fraction form
    13,170.40/18,174.51 = 7,505.39/x
  3. Step 3: Cross multiply
    13,170.40x = 18,174.51 × 7,505.39
  4. Step 4: Simplify right side
    13,170.40x = 136,406,831.05
  5. Step 5: Solve for x
    x = 136,406,831.05/13,170.40
  6. Step 6: Final answer
    x = 10,357.08

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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.