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Finding the Fourth Proportional to 18,813, 28,210.95 and 8,964.18

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Solution

The fourth proportional to 18,813, 28,210.95 and 8,964.18 is: 13,442.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813 : 28,210.95 = 8,964.18 : x
  2. Step 2: Convert to fraction form
    18,813/28,210.95 = 8,964.18/x
  3. Step 3: Cross multiply
    18,813x = 28,210.95 × 8,964.18
  4. Step 4: Simplify right side
    18,813x = 252,888,033.77
  5. Step 5: Solve for x
    x = 252,888,033.77/18,813
  6. Step 6: Final answer
    x = 13,442.20

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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.