Home / 28,101.20-38,779.20-15,354.11

Finding the Fourth Proportional to 28,101.20, 38,779.20 and 15,354.11

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Solution

The fourth proportional to 28,101.20, 38,779.20 and 15,354.11 is: 21,188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.20 : 38,779.20 = 15,354.11 : x
  2. Step 2: Convert to fraction form
    28,101.20/38,779.20 = 15,354.11/x
  3. Step 3: Cross multiply
    28,101.20x = 38,779.20 × 15,354.11
  4. Step 4: Simplify right side
    28,101.20x = 595,420,054.04
  5. Step 5: Solve for x
    x = 595,420,054.04/28,101.20
  6. Step 6: Final answer
    x = 21,188.42

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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.