Home / 28,188.95-38,899.09-15,439.59

Finding the Fourth Proportional to 28,188.95, 38,899.09 and 15,439.59

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Solution

The fourth proportional to 28,188.95, 38,899.09 and 15,439.59 is: 21,305.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.95 : 38,899.09 = 15,439.59 : x
  2. Step 2: Convert to fraction form
    28,188.95/38,899.09 = 15,439.59/x
  3. Step 3: Cross multiply
    28,188.95x = 38,899.09 × 15,439.59
  4. Step 4: Simplify right side
    28,188.95x = 600,586,108.25
  5. Step 5: Solve for x
    x = 600,586,108.25/28,188.95
  6. Step 6: Final answer
    x = 21,305.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.