Home / 13,486.80-18,611.20-7,518.16

Finding the Fourth Proportional to 13,486.80, 18,611.20 and 7,518.16

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Solution

The fourth proportional to 13,486.80, 18,611.20 and 7,518.16 is: 10,374.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.80 : 18,611.20 = 7,518.16 : x
  2. Step 2: Convert to fraction form
    13,486.80/18,611.20 = 7,518.16/x
  3. Step 3: Cross multiply
    13,486.80x = 18,611.20 × 7,518.16
  4. Step 4: Simplify right side
    13,486.80x = 139,921,979.39
  5. Step 5: Solve for x
    x = 139,921,979.39/13,486.80
  6. Step 6: Final answer
    x = 10,374.74

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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.