Home / 20,765.40-28,657.06-11,813.72

Finding the Fourth Proportional to 20,765.40, 28,657.06 and 11,813.72

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Solution

The fourth proportional to 20,765.40, 28,657.06 and 11,813.72 is: 16,303.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.40 : 28,657.06 = 11,813.72 : x
  2. Step 2: Convert to fraction form
    20,765.40/28,657.06 = 11,813.72/x
  3. Step 3: Cross multiply
    20,765.40x = 28,657.06 × 11,813.72
  4. Step 4: Simplify right side
    20,765.40x = 338,546,482.86
  5. Step 5: Solve for x
    x = 338,546,482.86/20,765.40
  6. Step 6: Final answer
    x = 16,303.39

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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.