Home / 12,739.42-19,109.13-8,355.86

Finding the Fourth Proportional to 12,739.42, 19,109.13 and 8,355.86

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Solution

The fourth proportional to 12,739.42, 19,109.13 and 8,355.86 is: 12,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.42 : 19,109.13 = 8,355.86 : x
  2. Step 2: Convert to fraction form
    12,739.42/19,109.13 = 8,355.86/x
  3. Step 3: Cross multiply
    12,739.42x = 19,109.13 × 8,355.86
  4. Step 4: Simplify right side
    12,739.42x = 159,673,159.78
  5. Step 5: Solve for x
    x = 159,673,159.78/12,739.42
  6. Step 6: Final answer
    x = 12,533.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.