Home / 18,138.60-25,034.34-10,690.28

Finding the Fourth Proportional to 18,138.60, 25,034.34 and 10,690.28

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Solution

The fourth proportional to 18,138.60, 25,034.34 and 10,690.28 is: 14,754.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.60 : 25,034.34 = 10,690.28 : x
  2. Step 2: Convert to fraction form
    18,138.60/25,034.34 = 10,690.28/x
  3. Step 3: Cross multiply
    18,138.60x = 25,034.34 × 10,690.28
  4. Step 4: Simplify right side
    18,138.60x = 267,624,104.22
  5. Step 5: Solve for x
    x = 267,624,104.22/18,138.60
  6. Step 6: Final answer
    x = 14,754.40

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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.