Home / 13,097.40-18,074.34-7,128.92

Finding the Fourth Proportional to 13,097.40, 18,074.34 and 7,128.92

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Solution

The fourth proportional to 13,097.40, 18,074.34 and 7,128.92 is: 9,837.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,097.40 : 18,074.34 = 7,128.92 : x
  2. Step 2: Convert to fraction form
    13,097.40/18,074.34 = 7,128.92/x
  3. Step 3: Cross multiply
    13,097.40x = 18,074.34 × 7,128.92
  4. Step 4: Simplify right side
    13,097.40x = 128,850,523.91
  5. Step 5: Solve for x
    x = 128,850,523.91/13,097.40
  6. Step 6: Final answer
    x = 9,837.87

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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.