Home / 15,685.02-21,645.37-8,611.90

Finding the Fourth Proportional to 15,685.02, 21,645.37 and 8,611.90

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Solution

The fourth proportional to 15,685.02, 21,645.37 and 8,611.90 is: 11,884.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.02 : 21,645.37 = 8,611.90 : x
  2. Step 2: Convert to fraction form
    15,685.02/21,645.37 = 8,611.90/x
  3. Step 3: Cross multiply
    15,685.02x = 21,645.37 × 8,611.90
  4. Step 4: Simplify right side
    15,685.02x = 186,407,761.90
  5. Step 5: Solve for x
    x = 186,407,761.90/15,685.02
  6. Step 6: Final answer
    x = 11,884.45

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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.