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Finding the Fourth Proportional to 13,356.90, 18,411.14 and 9,048.68

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Solution

The fourth proportional to 13,356.90, 18,411.14 and 9,048.68 is: 12,472.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.90 : 18,411.14 = 9,048.68 : x
  2. Step 2: Convert to fraction form
    13,356.90/18,411.14 = 9,048.68/x
  3. Step 3: Cross multiply
    13,356.90x = 18,411.14 × 9,048.68
  4. Step 4: Simplify right side
    13,356.90x = 166,596,514.30
  5. Step 5: Solve for x
    x = 166,596,514.30/13,356.90
  6. Step 6: Final answer
    x = 12,472.69

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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.