Home / 13,615.23-18,789.75-8,308.50

Finding the Fourth Proportional to 13,615.23, 18,789.75 and 8,308.50

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Solution

The fourth proportional to 13,615.23, 18,789.75 and 8,308.50 is: 11,466.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.23 : 18,789.75 = 8,308.50 : x
  2. Step 2: Convert to fraction form
    13,615.23/18,789.75 = 8,308.50/x
  3. Step 3: Cross multiply
    13,615.23x = 18,789.75 × 8,308.50
  4. Step 4: Simplify right side
    13,615.23x = 156,114,637.88
  5. Step 5: Solve for x
    x = 156,114,637.88/13,615.23
  6. Step 6: Final answer
    x = 11,466.18

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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.