Home / 9,361.59-12,921.21-5,385

Finding the Fourth Proportional to 9,361.59, 12,921.21 and 5,385

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Solution

The fourth proportional to 9,361.59, 12,921.21 and 5,385 is: 7,432.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.59 : 12,921.21 = 5,385 : x
  2. Step 2: Convert to fraction form
    9,361.59/12,921.21 = 5,385/x
  3. Step 3: Cross multiply
    9,361.59x = 12,921.21 × 5,385
  4. Step 4: Simplify right side
    9,361.59x = 69,580,715.85
  5. Step 5: Solve for x
    x = 69,580,715.85/9,361.59
  6. Step 6: Final answer
    x = 7,432.57

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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.