Home / 13,157.64-18,156.84-7,188.18

Finding the Fourth Proportional to 13,157.64, 18,156.84 and 7,188.18

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Solution

The fourth proportional to 13,157.64, 18,156.84 and 7,188.18 is: 9,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.64 : 18,156.84 = 7,188.18 : x
  2. Step 2: Convert to fraction form
    13,157.64/18,156.84 = 7,188.18/x
  3. Step 3: Cross multiply
    13,157.64x = 18,156.84 × 7,188.18
  4. Step 4: Simplify right side
    13,157.64x = 130,514,634.15
  5. Step 5: Solve for x
    x = 130,514,634.15/13,157.64
  6. Step 6: Final answer
    x = 9,919.30

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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.