Home / 13,499.08-20,222.70-7,638.28

Finding the Fourth Proportional to 13,499.08, 20,222.70 and 7,638.28

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Solution

The fourth proportional to 13,499.08, 20,222.70 and 7,638.28 is: 11,442.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,499.08 : 20,222.70 = 7,638.28 : x
  2. Step 2: Convert to fraction form
    13,499.08/20,222.70 = 7,638.28/x
  3. Step 3: Cross multiply
    13,499.08x = 20,222.70 × 7,638.28
  4. Step 4: Simplify right side
    13,499.08x = 154,466,644.96
  5. Step 5: Solve for x
    x = 154,466,644.96/13,499.08
  6. Step 6: Final answer
    x = 11,442.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.