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Finding the Fourth Proportional to 7,312.10, 10,968.15 and 4,687.70

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Solution

The fourth proportional to 7,312.10, 10,968.15 and 4,687.70 is: 7,031.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.10 : 10,968.15 = 4,687.70 : x
  2. Step 2: Convert to fraction form
    7,312.10/10,968.15 = 4,687.70/x
  3. Step 3: Cross multiply
    7,312.10x = 10,968.15 × 4,687.70
  4. Step 4: Simplify right side
    7,312.10x = 51,415,396.76
  5. Step 5: Solve for x
    x = 51,415,396.76/7,312.10
  6. Step 6: Final answer
    x = 7,031.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.