Home / 20,485.78-28,239.66-16,703.14

Finding the Fourth Proportional to 20,485.78, 28,239.66 and 16,703.14

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Solution

The fourth proportional to 20,485.78, 28,239.66 and 16,703.14 is: 23,025.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.78 : 28,239.66 = 16,703.14 : x
  2. Step 2: Convert to fraction form
    20,485.78/28,239.66 = 16,703.14/x
  3. Step 3: Cross multiply
    20,485.78x = 28,239.66 × 16,703.14
  4. Step 4: Simplify right side
    20,485.78x = 471,690,994.53
  5. Step 5: Solve for x
    x = 471,690,994.53/20,485.78
  6. Step 6: Final answer
    x = 23,025.29

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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.