Home / 28,616.64-39,490.21-15,869.61

Finding the Fourth Proportional to 28,616.64, 39,490.21 and 15,869.61

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Solution

The fourth proportional to 28,616.64, 39,490.21 and 15,869.61 is: 21,899.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.64 : 39,490.21 = 15,869.61 : x
  2. Step 2: Convert to fraction form
    28,616.64/39,490.21 = 15,869.61/x
  3. Step 3: Cross multiply
    28,616.64x = 39,490.21 × 15,869.61
  4. Step 4: Simplify right side
    28,616.64x = 626,694,231.52
  5. Step 5: Solve for x
    x = 626,694,231.52/28,616.64
  6. Step 6: Final answer
    x = 21,899.64

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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.