Home / 13,726.18-18,944.15-8,690.87

Finding the Fourth Proportional to 13,726.18, 18,944.15 and 8,690.87

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Solution

The fourth proportional to 13,726.18, 18,944.15 and 8,690.87 is: 11,994.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.18 : 18,944.15 = 8,690.87 : x
  2. Step 2: Convert to fraction form
    13,726.18/18,944.15 = 8,690.87/x
  3. Step 3: Cross multiply
    13,726.18x = 18,944.15 × 8,690.87
  4. Step 4: Simplify right side
    13,726.18x = 164,641,071.92
  5. Step 5: Solve for x
    x = 164,641,071.92/13,726.18
  6. Step 6: Final answer
    x = 11,994.68

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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.