Home / 28,228.36-39,005.88-20,256.58

Finding the Fourth Proportional to 28,228.36, 39,005.88 and 20,256.58

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Solution

The fourth proportional to 28,228.36, 39,005.88 and 20,256.58 is: 27,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.36 : 39,005.88 = 20,256.58 : x
  2. Step 2: Convert to fraction form
    28,228.36/39,005.88 = 20,256.58/x
  3. Step 3: Cross multiply
    28,228.36x = 39,005.88 × 20,256.58
  4. Step 4: Simplify right side
    28,228.36x = 790,125,728.69
  5. Step 5: Solve for x
    x = 790,125,728.69/28,228.36
  6. Step 6: Final answer
    x = 27,990.49

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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.