Home / 12,615.50-18,911.49-4,289.83

Finding the Fourth Proportional to 12,615.50, 18,911.49 and 4,289.83

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Solution

The fourth proportional to 12,615.50, 18,911.49 and 4,289.83 is: 6,430.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.50 : 18,911.49 = 4,289.83 : x
  2. Step 2: Convert to fraction form
    12,615.50/18,911.49 = 4,289.83/x
  3. Step 3: Cross multiply
    12,615.50x = 18,911.49 × 4,289.83
  4. Step 4: Simplify right side
    12,615.50x = 81,127,077.15
  5. Step 5: Solve for x
    x = 81,127,077.15/12,615.50
  6. Step 6: Final answer
    x = 6,430.75

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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.