Home / 20,938.65-28,894.82-11,985.58

Finding the Fourth Proportional to 20,938.65, 28,894.82 and 11,985.58

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Solution

The fourth proportional to 20,938.65, 28,894.82 and 11,985.58 is: 16,539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.65 : 28,894.82 = 11,985.58 : x
  2. Step 2: Convert to fraction form
    20,938.65/28,894.82 = 11,985.58/x
  3. Step 3: Cross multiply
    20,938.65x = 28,894.82 × 11,985.58
  4. Step 4: Simplify right side
    20,938.65x = 346,321,176.70
  5. Step 5: Solve for x
    x = 346,321,176.70/20,938.65
  6. Step 6: Final answer
    x = 16,539.81

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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.