Home / 28,686.50-39,586.34-15,939.53

Finding the Fourth Proportional to 28,686.50, 39,586.34 and 15,939.53

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Solution

The fourth proportional to 28,686.50, 39,586.34 and 15,939.53 is: 21,995.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.50 : 39,586.34 = 15,939.53 : x
  2. Step 2: Convert to fraction form
    28,686.50/39,586.34 = 15,939.53/x
  3. Step 3: Cross multiply
    28,686.50x = 39,586.34 × 15,939.53
  4. Step 4: Simplify right side
    28,686.50x = 630,987,495.94
  5. Step 5: Solve for x
    x = 630,987,495.94/28,686.50
  6. Step 6: Final answer
    x = 21,995.98

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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.