Home / 28,398.20-39,136.37-20,426.58

Finding the Fourth Proportional to 28,398.20, 39,136.37 and 20,426.58

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Solution

The fourth proportional to 28,398.20, 39,136.37 and 20,426.58 is: 28,150.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.20 : 39,136.37 = 20,426.58 : x
  2. Step 2: Convert to fraction form
    28,398.20/39,136.37 = 20,426.58/x
  3. Step 3: Cross multiply
    28,398.20x = 39,136.37 × 20,426.58
  4. Step 4: Simplify right side
    28,398.20x = 799,422,090.58
  5. Step 5: Solve for x
    x = 799,422,090.58/28,398.20
  6. Step 6: Final answer
    x = 28,150.45

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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.