Home / 15,685.12-21,645.52-8,611.60

Finding the Fourth Proportional to 15,685.12, 21,645.52 and 8,611.60

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Solution

The fourth proportional to 15,685.12, 21,645.52 and 8,611.60 is: 11,884.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.12 : 21,645.52 = 8,611.60 : x
  2. Step 2: Convert to fraction form
    15,685.12/21,645.52 = 8,611.60/x
  3. Step 3: Cross multiply
    15,685.12x = 21,645.52 × 8,611.60
  4. Step 4: Simplify right side
    15,685.12x = 186,402,560.03
  5. Step 5: Solve for x
    x = 186,402,560.03/15,685.12
  6. Step 6: Final answer
    x = 11,884.04

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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.