Home / 13,721.60-18,928.85-8,677.33

Finding the Fourth Proportional to 13,721.60, 18,928.85 and 8,677.33

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Solution

The fourth proportional to 13,721.60, 18,928.85 and 8,677.33 is: 11,970.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.60 : 18,928.85 = 8,677.33 : x
  2. Step 2: Convert to fraction form
    13,721.60/18,928.85 = 8,677.33/x
  3. Step 3: Cross multiply
    13,721.60x = 18,928.85 × 8,677.33
  4. Step 4: Simplify right side
    13,721.60x = 164,251,787.26
  5. Step 5: Solve for x
    x = 164,251,787.26/13,721.60
  6. Step 6: Final answer
    x = 11,970.31

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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.