Home / 28,531.66-39,372.96-15,785.32

Finding the Fourth Proportional to 28,531.66, 39,372.96 and 15,785.32

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Solution

The fourth proportional to 28,531.66, 39,372.96 and 15,785.32 is: 21,783.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.66 : 39,372.96 = 15,785.32 : x
  2. Step 2: Convert to fraction form
    28,531.66/39,372.96 = 15,785.32/x
  3. Step 3: Cross multiply
    28,531.66x = 39,372.96 × 15,785.32
  4. Step 4: Simplify right side
    28,531.66x = 621,514,772.95
  5. Step 5: Solve for x
    x = 621,514,772.95/28,531.66
  6. Step 6: Final answer
    x = 21,783.34

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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.