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Finding the Fourth Proportional to 7,312.78, 10,968.21 and 2,930.29

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Solution

The fourth proportional to 7,312.78, 10,968.21 and 2,930.29 is: 4,395.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.78 : 10,968.21 = 2,930.29 : x
  2. Step 2: Convert to fraction form
    7,312.78/10,968.21 = 2,930.29/x
  3. Step 3: Cross multiply
    7,312.78x = 10,968.21 × 2,930.29
  4. Step 4: Simplify right side
    7,312.78x = 32,140,036.08
  5. Step 5: Solve for x
    x = 32,140,036.08/7,312.78
  6. Step 6: Final answer
    x = 4,395.05

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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.