Home / 28,103.54-38,782.61-15,528.02

Finding the Fourth Proportional to 28,103.54, 38,782.61 and 15,528.02

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Solution

The fourth proportional to 28,103.54, 38,782.61 and 15,528.02 is: 21,428.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.54 : 38,782.61 = 15,528.02 : x
  2. Step 2: Convert to fraction form
    28,103.54/38,782.61 = 15,528.02/x
  3. Step 3: Cross multiply
    28,103.54x = 38,782.61 × 15,528.02
  4. Step 4: Simplify right side
    28,103.54x = 602,217,143.73
  5. Step 5: Solve for x
    x = 602,217,143.73/28,103.54
  6. Step 6: Final answer
    x = 21,428.52

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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.