Home / 20,435.14-28,218.93-12,894.85

Finding the Fourth Proportional to 20,435.14, 28,218.93 and 12,894.85

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Solution

The fourth proportional to 20,435.14, 28,218.93 and 12,894.85 is: 17,806.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.14 : 28,218.93 = 12,894.85 : x
  2. Step 2: Convert to fraction form
    20,435.14/28,218.93 = 12,894.85/x
  3. Step 3: Cross multiply
    20,435.14x = 28,218.93 × 12,894.85
  4. Step 4: Simplify right side
    20,435.14x = 363,878,869.51
  5. Step 5: Solve for x
    x = 363,878,869.51/20,435.14
  6. Step 6: Final answer
    x = 17,806.53

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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.