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Finding the Fourth Proportional to 19,062.95, 28,580 and 8,520.20

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Solution

The fourth proportional to 19,062.95, 28,580 and 8,520.20 is: 12,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,062.95 : 28,580 = 8,520.20 : x
  2. Step 2: Convert to fraction form
    19,062.95/28,580 = 8,520.20/x
  3. Step 3: Cross multiply
    19,062.95x = 28,580 × 8,520.20
  4. Step 4: Simplify right side
    19,062.95x = 243,507,316.00
  5. Step 5: Solve for x
    x = 243,507,316.00/19,062.95
  6. Step 6: Final answer
    x = 12,773.85

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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.