Home / 20,756.81-28,641.51-11,803.32

Finding the Fourth Proportional to 20,756.81, 28,641.51 and 11,803.32

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Solution

The fourth proportional to 20,756.81, 28,641.51 and 11,803.32 is: 16,286.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.81 : 28,641.51 = 11,803.32 : x
  2. Step 2: Convert to fraction form
    20,756.81/28,641.51 = 11,803.32/x
  3. Step 3: Cross multiply
    20,756.81x = 28,641.51 × 11,803.32
  4. Step 4: Simplify right side
    20,756.81x = 338,065,015.22
  5. Step 5: Solve for x
    x = 338,065,015.22/20,756.81
  6. Step 6: Final answer
    x = 16,286.94

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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.