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Finding the Fourth Proportional to 13,751.61, 18,929.04 and 11,980.14

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Solution

The fourth proportional to 13,751.61, 18,929.04 and 11,980.14 is: 16,490.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.61 : 18,929.04 = 11,980.14 : x
  2. Step 2: Convert to fraction form
    13,751.61/18,929.04 = 11,980.14/x
  3. Step 3: Cross multiply
    13,751.61x = 18,929.04 × 11,980.14
  4. Step 4: Simplify right side
    13,751.61x = 226,772,549.27
  5. Step 5: Solve for x
    x = 226,772,549.27/13,751.61
  6. Step 6: Final answer
    x = 16,490.62

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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.