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Finding the Fourth Proportional to 13,356.59, 18,424.05 and 8,819.31

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Solution

The fourth proportional to 13,356.59, 18,424.05 and 8,819.31 is: 12,165.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.59 : 18,424.05 = 8,819.31 : x
  2. Step 2: Convert to fraction form
    13,356.59/18,424.05 = 8,819.31/x
  3. Step 3: Cross multiply
    13,356.59x = 18,424.05 × 8,819.31
  4. Step 4: Simplify right side
    13,356.59x = 162,487,389.29
  5. Step 5: Solve for x
    x = 162,487,389.29/13,356.59
  6. Step 6: Final answer
    x = 12,165.34

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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.