Home / 20,488.12-28,282.32-13,777.62

Finding the Fourth Proportional to 20,488.12, 28,282.32 and 13,777.62

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Solution

The fourth proportional to 20,488.12, 28,282.32 and 13,777.62 is: 19,018.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.12 : 28,282.32 = 13,777.62 : x
  2. Step 2: Convert to fraction form
    20,488.12/28,282.32 = 13,777.62/x
  3. Step 3: Cross multiply
    20,488.12x = 28,282.32 × 13,777.62
  4. Step 4: Simplify right side
    20,488.12x = 389,663,057.68
  5. Step 5: Solve for x
    x = 389,663,057.68/20,488.12
  6. Step 6: Final answer
    x = 19,018.98

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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.