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Finding the Fourth Proportional to 7,915.50, 10,918.53 and 5,261.94

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Solution

The fourth proportional to 7,915.50, 10,918.53 and 5,261.94 is: 7,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.50 : 10,918.53 = 5,261.94 : x
  2. Step 2: Convert to fraction form
    7,915.50/10,918.53 = 5,261.94/x
  3. Step 3: Cross multiply
    7,915.50x = 10,918.53 × 5,261.94
  4. Step 4: Simplify right side
    7,915.50x = 57,452,649.75
  5. Step 5: Solve for x
    x = 57,452,649.75/7,915.50
  6. Step 6: Final answer
    x = 7,258.25

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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.