Home / 12,809.85-17,657.39-9,618.54

Finding the Fourth Proportional to 12,809.85, 17,657.39 and 9,618.54

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Solution

The fourth proportional to 12,809.85, 17,657.39 and 9,618.54 is: 13,258.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.85 : 17,657.39 = 9,618.54 : x
  2. Step 2: Convert to fraction form
    12,809.85/17,657.39 = 9,618.54/x
  3. Step 3: Cross multiply
    12,809.85x = 17,657.39 × 9,618.54
  4. Step 4: Simplify right side
    12,809.85x = 169,838,263.92
  5. Step 5: Solve for x
    x = 169,838,263.92/12,809.85
  6. Step 6: Final answer
    x = 13,258.41

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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.