Home / 28,756.90-39,650.58-19,686.62

Finding the Fourth Proportional to 28,756.90, 39,650.58 and 19,686.62

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Solution

The fourth proportional to 28,756.90, 39,650.58 and 19,686.62 is: 27,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,756.90 : 39,650.58 = 19,686.62 : x
  2. Step 2: Convert to fraction form
    28,756.90/39,650.58 = 19,686.62/x
  3. Step 3: Cross multiply
    28,756.90x = 39,650.58 × 19,686.62
  4. Step 4: Simplify right side
    28,756.90x = 780,586,000.37
  5. Step 5: Solve for x
    x = 780,586,000.37/28,756.90
  6. Step 6: Final answer
    x = 27,144.30

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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.