Home / 18,405.16-25,401.56-13,702.84

Finding the Fourth Proportional to 18,405.16, 25,401.56 and 13,702.84

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Solution

The fourth proportional to 18,405.16, 25,401.56 and 13,702.84 is: 18,911.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.16 : 25,401.56 = 13,702.84 : x
  2. Step 2: Convert to fraction form
    18,405.16/25,401.56 = 13,702.84/x
  3. Step 3: Cross multiply
    18,405.16x = 25,401.56 × 13,702.84
  4. Step 4: Simplify right side
    18,405.16x = 348,073,512.43
  5. Step 5: Solve for x
    x = 348,073,512.43/18,405.16
  6. Step 6: Final answer
    x = 18,911.74

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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.