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Finding the Fourth Proportional to 18,303.62, 25,258.93 and 9,920.14

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Solution

The fourth proportional to 18,303.62, 25,258.93 and 9,920.14 is: 13,689.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,303.62 : 25,258.93 = 9,920.14 : x
  2. Step 2: Convert to fraction form
    18,303.62/25,258.93 = 9,920.14/x
  3. Step 3: Cross multiply
    18,303.62x = 25,258.93 × 9,920.14
  4. Step 4: Simplify right side
    18,303.62x = 250,572,121.85
  5. Step 5: Solve for x
    x = 250,572,121.85/18,303.62
  6. Step 6: Final answer
    x = 13,689.76

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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.