Home / 20,187.90-30,281.85-16,688.70

Finding the Fourth Proportional to 20,187.90, 30,281.85 and 16,688.70

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Solution

The fourth proportional to 20,187.90, 30,281.85 and 16,688.70 is: 25,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.90 : 30,281.85 = 16,688.70 : x
  2. Step 2: Convert to fraction form
    20,187.90/30,281.85 = 16,688.70/x
  3. Step 3: Cross multiply
    20,187.90x = 30,281.85 × 16,688.70
  4. Step 4: Simplify right side
    20,187.90x = 505,364,710.10
  5. Step 5: Solve for x
    x = 505,364,710.10/20,187.90
  6. Step 6: Final answer
    x = 25,033.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.