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Finding the Fourth Proportional to 18,994.80, 26,230.32 and 12,725.40

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Solution

The fourth proportional to 18,994.80, 26,230.32 and 12,725.40 is: 17,572.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.80 : 26,230.32 = 12,725.40 : x
  2. Step 2: Convert to fraction form
    18,994.80/26,230.32 = 12,725.40/x
  3. Step 3: Cross multiply
    18,994.80x = 26,230.32 × 12,725.40
  4. Step 4: Simplify right side
    18,994.80x = 333,791,314.13
  5. Step 5: Solve for x
    x = 333,791,314.13/18,994.80
  6. Step 6: Final answer
    x = 17,572.77

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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.