Home / 15,375.12-21,216.60-9,086.28

Finding the Fourth Proportional to 15,375.12, 21,216.60 and 9,086.28

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Solution

The fourth proportional to 15,375.12, 21,216.60 and 9,086.28 is: 12,538.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.12 : 21,216.60 = 9,086.28 : x
  2. Step 2: Convert to fraction form
    15,375.12/21,216.60 = 9,086.28/x
  3. Step 3: Cross multiply
    15,375.12x = 21,216.60 × 9,086.28
  4. Step 4: Simplify right side
    15,375.12x = 192,779,968.25
  5. Step 5: Solve for x
    x = 192,779,968.25/15,375.12
  6. Step 6: Final answer
    x = 12,538.44

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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.