Home / 13,605.42-18,775.80-7,637.56

Finding the Fourth Proportional to 13,605.42, 18,775.80 and 7,637.56

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Solution

The fourth proportional to 13,605.42, 18,775.80 and 7,637.56 is: 10,540.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.42 : 18,775.80 = 7,637.56 : x
  2. Step 2: Convert to fraction form
    13,605.42/18,775.80 = 7,637.56/x
  3. Step 3: Cross multiply
    13,605.42x = 18,775.80 × 7,637.56
  4. Step 4: Simplify right side
    13,605.42x = 143,401,299.05
  5. Step 5: Solve for x
    x = 143,401,299.05/13,605.42
  6. Step 6: Final answer
    x = 10,540.01

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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.