Home / 13,644.78-20,445.30-7,798.20

Finding the Fourth Proportional to 13,644.78, 20,445.30 and 7,798.20

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Solution

The fourth proportional to 13,644.78, 20,445.30 and 7,798.20 is: 11,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,644.78 : 20,445.30 = 7,798.20 : x
  2. Step 2: Convert to fraction form
    13,644.78/20,445.30 = 7,798.20/x
  3. Step 3: Cross multiply
    13,644.78x = 20,445.30 × 7,798.20
  4. Step 4: Simplify right side
    13,644.78x = 159,436,538.46
  5. Step 5: Solve for x
    x = 159,436,538.46/13,644.78
  6. Step 6: Final answer
    x = 11,684.80

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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.