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Finding the Fourth Proportional to 13,355.80, 18,409.80 and 10,518.68

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Solution

The fourth proportional to 13,355.80, 18,409.80 and 10,518.68 is: 14,499.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.80 : 18,409.80 = 10,518.68 : x
  2. Step 2: Convert to fraction form
    13,355.80/18,409.80 = 10,518.68/x
  3. Step 3: Cross multiply
    13,355.80x = 18,409.80 × 10,518.68
  4. Step 4: Simplify right side
    13,355.80x = 193,646,795.06
  5. Step 5: Solve for x
    x = 193,646,795.06/13,355.80
  6. Step 6: Final answer
    x = 14,499.08

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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.