Home / 20,319.04-28,057.58-12,778

Finding the Fourth Proportional to 20,319.04, 28,057.58 and 12,778

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Solution

The fourth proportional to 20,319.04, 28,057.58 and 12,778 is: 17,644.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.04 : 28,057.58 = 12,778 : x
  2. Step 2: Convert to fraction form
    20,319.04/28,057.58 = 12,778/x
  3. Step 3: Cross multiply
    20,319.04x = 28,057.58 × 12,778
  4. Step 4: Simplify right side
    20,319.04x = 358,519,757.24
  5. Step 5: Solve for x
    x = 358,519,757.24/20,319.04
  6. Step 6: Final answer
    x = 17,644.52

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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.