Home / 11,615.81-17,430.64-4,220.85

Finding the Fourth Proportional to 11,615.81, 17,430.64 and 4,220.85

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Solution

The fourth proportional to 11,615.81, 17,430.64 and 4,220.85 is: 6,333.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,615.81 : 17,430.64 = 4,220.85 : x
  2. Step 2: Convert to fraction form
    11,615.81/17,430.64 = 4,220.85/x
  3. Step 3: Cross multiply
    11,615.81x = 17,430.64 × 4,220.85
  4. Step 4: Simplify right side
    11,615.81x = 73,572,116.84
  5. Step 5: Solve for x
    x = 73,572,116.84/11,615.81
  6. Step 6: Final answer
    x = 6,333.79

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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.