Home / 28,190.58-38,903.04-15,615.42

Finding the Fourth Proportional to 28,190.58, 38,903.04 and 15,615.42

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Solution

The fourth proportional to 28,190.58, 38,903.04 and 15,615.42 is: 21,549.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.58 : 38,903.04 = 15,615.42 : x
  2. Step 2: Convert to fraction form
    28,190.58/38,903.04 = 15,615.42/x
  3. Step 3: Cross multiply
    28,190.58x = 38,903.04 × 15,615.42
  4. Step 4: Simplify right side
    28,190.58x = 607,487,308.88
  5. Step 5: Solve for x
    x = 607,487,308.88/28,190.58
  6. Step 6: Final answer
    x = 21,549.30

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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.