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Finding the Fourth Proportional to 18,774.56, 28,155.36 and 5,623.40

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Solution

The fourth proportional to 18,774.56, 28,155.36 and 5,623.40 is: 8,433.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.56 : 28,155.36 = 5,623.40 : x
  2. Step 2: Convert to fraction form
    18,774.56/28,155.36 = 5,623.40/x
  3. Step 3: Cross multiply
    18,774.56x = 28,155.36 × 5,623.40
  4. Step 4: Simplify right side
    18,774.56x = 158,328,851.42
  5. Step 5: Solve for x
    x = 158,328,851.42/18,774.56
  6. Step 6: Final answer
    x = 8,433.16

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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.