Home / 15,422.42-21,281.70-8,709.68

Finding the Fourth Proportional to 15,422.42, 21,281.70 and 8,709.68

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Solution

The fourth proportional to 15,422.42, 21,281.70 and 8,709.68 is: 12,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.42 : 21,281.70 = 8,709.68 : x
  2. Step 2: Convert to fraction form
    15,422.42/21,281.70 = 8,709.68/x
  3. Step 3: Cross multiply
    15,422.42x = 21,281.70 × 8,709.68
  4. Step 4: Simplify right side
    15,422.42x = 185,356,796.86
  5. Step 5: Solve for x
    x = 185,356,796.86/15,422.42
  6. Step 6: Final answer
    x = 12,018.66

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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.