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Finding the Fourth Proportional to 18,763.85, 28,149.18 and 8,903.04

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Solution

The fourth proportional to 18,763.85, 28,149.18 and 8,903.04 is: 13,356.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.85 : 28,149.18 = 8,903.04 : x
  2. Step 2: Convert to fraction form
    18,763.85/28,149.18 = 8,903.04/x
  3. Step 3: Cross multiply
    18,763.85x = 28,149.18 × 8,903.04
  4. Step 4: Simplify right side
    18,763.85x = 250,613,157.02
  5. Step 5: Solve for x
    x = 250,613,157.02/18,763.85
  6. Step 6: Final answer
    x = 13,356.17

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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.