Home / 28,102.73-42,167.88-12,305.61

Finding the Fourth Proportional to 28,102.73, 42,167.88 and 12,305.61

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Solution

The fourth proportional to 28,102.73, 42,167.88 and 12,305.61 is: 18,464.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.73 : 42,167.88 = 12,305.61 : x
  2. Step 2: Convert to fraction form
    28,102.73/42,167.88 = 12,305.61/x
  3. Step 3: Cross multiply
    28,102.73x = 42,167.88 × 12,305.61
  4. Step 4: Simplify right side
    28,102.73x = 518,901,485.81
  5. Step 5: Solve for x
    x = 518,901,485.81/28,102.73
  6. Step 6: Final answer
    x = 18,464.45

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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.