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Finding the Fourth Proportional to 13,572, 18,752.64 and 11,209.92

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Solution

The fourth proportional to 13,572, 18,752.64 and 11,209.92 is: 15,488.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572 : 18,752.64 = 11,209.92 : x
  2. Step 2: Convert to fraction form
    13,572/18,752.64 = 11,209.92/x
  3. Step 3: Cross multiply
    13,572x = 18,752.64 × 11,209.92
  4. Step 4: Simplify right side
    13,572x = 210,215,594.19
  5. Step 5: Solve for x
    x = 210,215,594.19/13,572
  6. Step 6: Final answer
    x = 15,488.92

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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.