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Finding the Fourth Proportional to 7,900.10, 10,901.70 and 4,915.84

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Solution

The fourth proportional to 7,900.10, 10,901.70 and 4,915.84 is: 6,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.10 : 10,901.70 = 4,915.84 : x
  2. Step 2: Convert to fraction form
    7,900.10/10,901.70 = 4,915.84/x
  3. Step 3: Cross multiply
    7,900.10x = 10,901.70 × 4,915.84
  4. Step 4: Simplify right side
    7,900.10x = 53,591,012.93
  5. Step 5: Solve for x
    x = 53,591,012.93/7,900.10
  6. Step 6: Final answer
    x = 6,783.59

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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.