Home / 18,138.32-25,032.18-10,072.40

Finding the Fourth Proportional to 18,138.32, 25,032.18 and 10,072.40

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Solution

The fourth proportional to 18,138.32, 25,032.18 and 10,072.40 is: 13,900.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.32 : 25,032.18 = 10,072.40 : x
  2. Step 2: Convert to fraction form
    18,138.32/25,032.18 = 10,072.40/x
  3. Step 3: Cross multiply
    18,138.32x = 25,032.18 × 10,072.40
  4. Step 4: Simplify right side
    18,138.32x = 252,134,129.83
  5. Step 5: Solve for x
    x = 252,134,129.83/18,138.32
  6. Step 6: Final answer
    x = 13,900.63

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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.