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Finding the Fourth Proportional to 12,430.56, 18,645.80 and 8,523.12

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Solution

The fourth proportional to 12,430.56, 18,645.80 and 8,523.12 is: 12,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.56 : 18,645.80 = 8,523.12 : x
  2. Step 2: Convert to fraction form
    12,430.56/18,645.80 = 8,523.12/x
  3. Step 3: Cross multiply
    12,430.56x = 18,645.80 × 8,523.12
  4. Step 4: Simplify right side
    12,430.56x = 158,920,390.90
  5. Step 5: Solve for x
    x = 158,920,390.90/12,430.56
  6. Step 6: Final answer
    x = 12,784.65

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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.