Home / 15,330.84-21,157.31-9,361.55

Finding the Fourth Proportional to 15,330.84, 21,157.31 and 9,361.55

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Solution

The fourth proportional to 15,330.84, 21,157.31 and 9,361.55 is: 12,919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.84 : 21,157.31 = 9,361.55 : x
  2. Step 2: Convert to fraction form
    15,330.84/21,157.31 = 9,361.55/x
  3. Step 3: Cross multiply
    15,330.84x = 21,157.31 × 9,361.55
  4. Step 4: Simplify right side
    15,330.84x = 198,065,133.05
  5. Step 5: Solve for x
    x = 198,065,133.05/15,330.84
  6. Step 6: Final answer
    x = 12,919.39

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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.