Home / 20,377.25-28,120.65-11,303.25

Finding the Fourth Proportional to 20,377.25, 28,120.65 and 11,303.25

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Solution

The fourth proportional to 20,377.25, 28,120.65 and 11,303.25 is: 15,598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.25 : 28,120.65 = 11,303.25 : x
  2. Step 2: Convert to fraction form
    20,377.25/28,120.65 = 11,303.25/x
  3. Step 3: Cross multiply
    20,377.25x = 28,120.65 × 11,303.25
  4. Step 4: Simplify right side
    20,377.25x = 317,854,589.27
  5. Step 5: Solve for x
    x = 317,854,589.27/20,377.25
  6. Step 6: Final answer
    x = 15,598.50

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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.