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Finding the Fourth Proportional to 8,869.10, 13,254.62 and 8,356.98

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Solution

The fourth proportional to 8,869.10, 13,254.62 and 8,356.98 is: 12,489.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869.10 : 13,254.62 = 8,356.98 : x
  2. Step 2: Convert to fraction form
    8,869.10/13,254.62 = 8,356.98/x
  3. Step 3: Cross multiply
    8,869.10x = 13,254.62 × 8,356.98
  4. Step 4: Simplify right side
    8,869.10x = 110,768,594.25
  5. Step 5: Solve for x
    x = 110,768,594.25/8,869.10
  6. Step 6: Final answer
    x = 12,489.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.