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Finding the Fourth Proportional to 28,191.52, 42,303.48 and 12,607.12

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Solution

The fourth proportional to 28,191.52, 42,303.48 and 12,607.12 is: 18,917.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.52 : 42,303.48 = 12,607.12 : x
  2. Step 2: Convert to fraction form
    28,191.52/42,303.48 = 12,607.12/x
  3. Step 3: Cross multiply
    28,191.52x = 42,303.48 × 12,607.12
  4. Step 4: Simplify right side
    28,191.52x = 533,325,048.78
  5. Step 5: Solve for x
    x = 533,325,048.78/28,191.52
  6. Step 6: Final answer
    x = 18,917.92

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.