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Finding the Fourth Proportional to 18,258.40, 27,368.70 and 9,920.80

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Solution

The fourth proportional to 18,258.40, 27,368.70 and 9,920.80 is: 14,870.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,258.40 : 27,368.70 = 9,920.80 : x
  2. Step 2: Convert to fraction form
    18,258.40/27,368.70 = 9,920.80/x
  3. Step 3: Cross multiply
    18,258.40x = 27,368.70 × 9,920.80
  4. Step 4: Simplify right side
    18,258.40x = 271,519,398.96
  5. Step 5: Solve for x
    x = 271,519,398.96/18,258.40
  6. Step 6: Final answer
    x = 14,870.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.