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Finding the Fourth Proportional to 7,903.68, 11,915.50 and 7,480.32

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Solution

The fourth proportional to 7,903.68, 11,915.50 and 7,480.32 is: 11,277.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.68 : 11,915.50 = 7,480.32 : x
  2. Step 2: Convert to fraction form
    7,903.68/11,915.50 = 7,480.32/x
  3. Step 3: Cross multiply
    7,903.68x = 11,915.50 × 7,480.32
  4. Step 4: Simplify right side
    7,903.68x = 89,131,752.96
  5. Step 5: Solve for x
    x = 89,131,752.96/7,903.68
  6. Step 6: Final answer
    x = 11,277.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.