Home / 20,310.90-28,041.15-12,763.62

Finding the Fourth Proportional to 20,310.90, 28,041.15 and 12,763.62

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Solution

The fourth proportional to 20,310.90, 28,041.15 and 12,763.62 is: 17,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.90 : 28,041.15 = 12,763.62 : x
  2. Step 2: Convert to fraction form
    20,310.90/28,041.15 = 12,763.62/x
  3. Step 3: Cross multiply
    20,310.90x = 28,041.15 × 12,763.62
  4. Step 4: Simplify right side
    20,310.90x = 357,906,582.96
  5. Step 5: Solve for x
    x = 357,906,582.96/20,310.90
  6. Step 6: Final answer
    x = 17,621.40

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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.