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Finding the Fourth Proportional to 18,739.80, 28,113.12 and 6,258.63

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Solution

The fourth proportional to 18,739.80, 28,113.12 and 6,258.63 is: 9,389.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.80 : 28,113.12 = 6,258.63 : x
  2. Step 2: Convert to fraction form
    18,739.80/28,113.12 = 6,258.63/x
  3. Step 3: Cross multiply
    18,739.80x = 28,113.12 × 6,258.63
  4. Step 4: Simplify right side
    18,739.80x = 175,949,616.23
  5. Step 5: Solve for x
    x = 175,949,616.23/18,739.80
  6. Step 6: Final answer
    x = 9,389.09

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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.