Home / 28,439.66-42,659.71-18,640.99

Finding the Fourth Proportional to 28,439.66, 42,659.71 and 18,640.99

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Solution

The fourth proportional to 28,439.66, 42,659.71 and 18,640.99 is: 27,961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.66 : 42,659.71 = 18,640.99 : x
  2. Step 2: Convert to fraction form
    28,439.66/42,659.71 = 18,640.99/x
  3. Step 3: Cross multiply
    28,439.66x = 42,659.71 × 18,640.99
  4. Step 4: Simplify right side
    28,439.66x = 795,219,099.13
  5. Step 5: Solve for x
    x = 795,219,099.13/28,439.66
  6. Step 6: Final answer
    x = 27,961.63

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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.