Home / 13,508.89-18,638.99-7,918.81

Finding the Fourth Proportional to 13,508.89, 18,638.99 and 7,918.81

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Solution

The fourth proportional to 13,508.89, 18,638.99 and 7,918.81 is: 10,926.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.89 : 18,638.99 = 7,918.81 : x
  2. Step 2: Convert to fraction form
    13,508.89/18,638.99 = 7,918.81/x
  3. Step 3: Cross multiply
    13,508.89x = 18,638.99 × 7,918.81
  4. Step 4: Simplify right side
    13,508.89x = 147,598,580.81
  5. Step 5: Solve for x
    x = 147,598,580.81/13,508.89
  6. Step 6: Final answer
    x = 10,926.03

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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.