Home / 28,003.50-38,644.83-15,428.52

Finding the Fourth Proportional to 28,003.50, 38,644.83 and 15,428.52

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Solution

The fourth proportional to 28,003.50, 38,644.83 and 15,428.52 is: 21,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.50 : 38,644.83 = 15,428.52 : x
  2. Step 2: Convert to fraction form
    28,003.50/38,644.83 = 15,428.52/x
  3. Step 3: Cross multiply
    28,003.50x = 38,644.83 × 15,428.52
  4. Step 4: Simplify right side
    28,003.50x = 596,232,532.55
  5. Step 5: Solve for x
    x = 596,232,532.55/28,003.50
  6. Step 6: Final answer
    x = 21,291.36

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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.