Home / 8,938.32-12,336.21-5,160.78

Finding the Fourth Proportional to 8,938.32, 12,336.21 and 5,160.78

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Solution

The fourth proportional to 8,938.32, 12,336.21 and 5,160.78 is: 7,122.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.32 : 12,336.21 = 5,160.78 : x
  2. Step 2: Convert to fraction form
    8,938.32/12,336.21 = 5,160.78/x
  3. Step 3: Cross multiply
    8,938.32x = 12,336.21 × 5,160.78
  4. Step 4: Simplify right side
    8,938.32x = 63,664,465.84
  5. Step 5: Solve for x
    x = 63,664,465.84/8,938.32
  6. Step 6: Final answer
    x = 7,122.64

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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.