Home / 15,690.20-21,652.26-9,404.60

Finding the Fourth Proportional to 15,690.20, 21,652.26 and 9,404.60

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Solution

The fourth proportional to 15,690.20, 21,652.26 and 9,404.60 is: 12,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.20 : 21,652.26 = 9,404.60 : x
  2. Step 2: Convert to fraction form
    15,690.20/21,652.26 = 9,404.60/x
  3. Step 3: Cross multiply
    15,690.20x = 21,652.26 × 9,404.60
  4. Step 4: Simplify right side
    15,690.20x = 203,630,844.40
  5. Step 5: Solve for x
    x = 203,630,844.40/15,690.20
  6. Step 6: Final answer
    x = 12,978.22

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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.