Home / 20,465.87-28,246.82-12,812.72

Finding the Fourth Proportional to 20,465.87, 28,246.82 and 12,812.72

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Solution

The fourth proportional to 20,465.87, 28,246.82 and 12,812.72 is: 17,684.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.87 : 28,246.82 = 12,812.72 : x
  2. Step 2: Convert to fraction form
    20,465.87/28,246.82 = 12,812.72/x
  3. Step 3: Cross multiply
    20,465.87x = 28,246.82 × 12,812.72
  4. Step 4: Simplify right side
    20,465.87x = 361,918,390.25
  5. Step 5: Solve for x
    x = 361,918,390.25/20,465.87
  6. Step 6: Final answer
    x = 17,684.00

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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.