Home / 11,220.48-15,487.20-7,682.40

Finding the Fourth Proportional to 11,220.48, 15,487.20 and 7,682.40

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Solution

The fourth proportional to 11,220.48, 15,487.20 and 7,682.40 is: 10,603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.48 : 15,487.20 = 7,682.40 : x
  2. Step 2: Convert to fraction form
    11,220.48/15,487.20 = 7,682.40/x
  3. Step 3: Cross multiply
    11,220.48x = 15,487.20 × 7,682.40
  4. Step 4: Simplify right side
    11,220.48x = 118,978,865.28
  5. Step 5: Solve for x
    x = 118,978,865.28/11,220.48
  6. Step 6: Final answer
    x = 10,603.72

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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.