Home / 15,136.68-20,888.22-8,422.32

Finding the Fourth Proportional to 15,136.68, 20,888.22 and 8,422.32

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Solution

The fourth proportional to 15,136.68, 20,888.22 and 8,422.32 is: 11,622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.68 : 20,888.22 = 8,422.32 : x
  2. Step 2: Convert to fraction form
    15,136.68/20,888.22 = 8,422.32/x
  3. Step 3: Cross multiply
    15,136.68x = 20,888.22 × 8,422.32
  4. Step 4: Simplify right side
    15,136.68x = 175,927,273.07
  5. Step 5: Solve for x
    x = 175,927,273.07/15,136.68
  6. Step 6: Final answer
    x = 11,622.58

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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.