Home / 20,825.10-31,237.65-12,530.70

Finding the Fourth Proportional to 20,825.10, 31,237.65 and 12,530.70

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Solution

The fourth proportional to 20,825.10, 31,237.65 and 12,530.70 is: 18,796.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.10 : 31,237.65 = 12,530.70 : x
  2. Step 2: Convert to fraction form
    20,825.10/31,237.65 = 12,530.70/x
  3. Step 3: Cross multiply
    20,825.10x = 31,237.65 × 12,530.70
  4. Step 4: Simplify right side
    20,825.10x = 391,429,620.86
  5. Step 5: Solve for x
    x = 391,429,620.86/20,825.10
  6. Step 6: Final answer
    x = 18,796.05

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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.