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Finding the Fourth Proportional to 8,554.70, 12,840.15 and 5,274.20

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Solution

The fourth proportional to 8,554.70, 12,840.15 and 5,274.20 is: 7,916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,554.70 : 12,840.15 = 5,274.20 : x
  2. Step 2: Convert to fraction form
    8,554.70/12,840.15 = 5,274.20/x
  3. Step 3: Cross multiply
    8,554.70x = 12,840.15 × 5,274.20
  4. Step 4: Simplify right side
    8,554.70x = 67,721,519.13
  5. Step 5: Solve for x
    x = 67,721,519.13/8,554.70
  6. Step 6: Final answer
    x = 7,916.29

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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.