Home / 11,163.48-15,396.81-9,888.72

Finding the Fourth Proportional to 11,163.48, 15,396.81 and 9,888.72

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Solution

The fourth proportional to 11,163.48, 15,396.81 and 9,888.72 is: 13,638.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.48 : 15,396.81 = 9,888.72 : x
  2. Step 2: Convert to fraction form
    11,163.48/15,396.81 = 9,888.72/x
  3. Step 3: Cross multiply
    11,163.48x = 15,396.81 × 9,888.72
  4. Step 4: Simplify right side
    11,163.48x = 152,254,742.98
  5. Step 5: Solve for x
    x = 152,254,742.98/11,163.48
  6. Step 6: Final answer
    x = 13,638.65

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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.