Home / 13,402.51-18,507.21-8,375.31

Finding the Fourth Proportional to 13,402.51, 18,507.21 and 8,375.31

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Solution

The fourth proportional to 13,402.51, 18,507.21 and 8,375.31 is: 11,565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402.51 : 18,507.21 = 8,375.31 : x
  2. Step 2: Convert to fraction form
    13,402.51/18,507.21 = 8,375.31/x
  3. Step 3: Cross multiply
    13,402.51x = 18,507.21 × 8,375.31
  4. Step 4: Simplify right side
    13,402.51x = 155,003,620.99
  5. Step 5: Solve for x
    x = 155,003,620.99/13,402.51
  6. Step 6: Final answer
    x = 11,565.27

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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.