Home / 13,731.51-18,937.56-8,949.61

Finding the Fourth Proportional to 13,731.51, 18,937.56 and 8,949.61

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Solution

The fourth proportional to 13,731.51, 18,937.56 and 8,949.61 is: 12,342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.51 : 18,937.56 = 8,949.61 : x
  2. Step 2: Convert to fraction form
    13,731.51/18,937.56 = 8,949.61/x
  3. Step 3: Cross multiply
    13,731.51x = 18,937.56 × 8,949.61
  4. Step 4: Simplify right side
    13,731.51x = 169,483,776.35
  5. Step 5: Solve for x
    x = 169,483,776.35/13,731.51
  6. Step 6: Final answer
    x = 12,342.69

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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.