Home / 47,739.12-71,609.88-12,678.72

Finding the Fourth Proportional to 47,739.12, 71,609.88 and 12,678.72

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Solution

The fourth proportional to 47,739.12, 71,609.88 and 12,678.72 is: 19,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,739.12 : 71,609.88 = 12,678.72 : x
  2. Step 2: Convert to fraction form
    47,739.12/71,609.88 = 12,678.72/x
  3. Step 3: Cross multiply
    47,739.12x = 71,609.88 × 12,678.72
  4. Step 4: Simplify right side
    47,739.12x = 907,921,617.75
  5. Step 5: Solve for x
    x = 907,921,617.75/47,739.12
  6. Step 6: Final answer
    x = 19,018.40

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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.