Home / 28,006.78-38,648.52-15,431.56

Finding the Fourth Proportional to 28,006.78, 38,648.52 and 15,431.56

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Solution

The fourth proportional to 28,006.78, 38,648.52 and 15,431.56 is: 21,295.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.78 : 38,648.52 = 15,431.56 : x
  2. Step 2: Convert to fraction form
    28,006.78/38,648.52 = 15,431.56/x
  3. Step 3: Cross multiply
    28,006.78x = 38,648.52 × 15,431.56
  4. Step 4: Simplify right side
    28,006.78x = 596,406,955.29
  5. Step 5: Solve for x
    x = 596,406,955.29/28,006.78
  6. Step 6: Final answer
    x = 21,295.09

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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.