Home / 28,731.78-39,650.34-15,985.98

Finding the Fourth Proportional to 28,731.78, 39,650.34 and 15,985.98

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Solution

The fourth proportional to 28,731.78, 39,650.34 and 15,985.98 is: 22,060.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.78 : 39,650.34 = 15,985.98 : x
  2. Step 2: Convert to fraction form
    28,731.78/39,650.34 = 15,985.98/x
  3. Step 3: Cross multiply
    28,731.78x = 39,650.34 × 15,985.98
  4. Step 4: Simplify right side
    28,731.78x = 633,849,542.23
  5. Step 5: Solve for x
    x = 633,849,542.23/28,731.78
  6. Step 6: Final answer
    x = 22,060.92

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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.