Home / 20,478.02-30,716.82-9,381.56

Finding the Fourth Proportional to 20,478.02, 30,716.82 and 9,381.56

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Solution

The fourth proportional to 20,478.02, 30,716.82 and 9,381.56 is: 14,072.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.02 : 30,716.82 = 9,381.56 : x
  2. Step 2: Convert to fraction form
    20,478.02/30,716.82 = 9,381.56/x
  3. Step 3: Cross multiply
    20,478.02x = 30,716.82 × 9,381.56
  4. Step 4: Simplify right side
    20,478.02x = 288,171,536.26
  5. Step 5: Solve for x
    x = 288,171,536.26/20,478.02
  6. Step 6: Final answer
    x = 14,072.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.