Home / 15,690.42-21,652.79-8,617.28

Finding the Fourth Proportional to 15,690.42, 21,652.79 and 8,617.28

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Solution

The fourth proportional to 15,690.42, 21,652.79 and 8,617.28 is: 11,891.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.42 : 21,652.79 = 8,617.28 : x
  2. Step 2: Convert to fraction form
    15,690.42/21,652.79 = 8,617.28/x
  3. Step 3: Cross multiply
    15,690.42x = 21,652.79 × 8,617.28
  4. Step 4: Simplify right side
    15,690.42x = 186,588,002.86
  5. Step 5: Solve for x
    x = 186,588,002.86/15,690.42
  6. Step 6: Final answer
    x = 11,891.84

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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.