Home / 13,420.76-20,118.80-4,649.54

Finding the Fourth Proportional to 13,420.76, 20,118.80 and 4,649.54

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Solution

The fourth proportional to 13,420.76, 20,118.80 and 4,649.54 is: 6,970.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.76 : 20,118.80 = 4,649.54 : x
  2. Step 2: Convert to fraction form
    13,420.76/20,118.80 = 4,649.54/x
  3. Step 3: Cross multiply
    13,420.76x = 20,118.80 × 4,649.54
  4. Step 4: Simplify right side
    13,420.76x = 93,543,165.35
  5. Step 5: Solve for x
    x = 93,543,165.35/13,420.76
  6. Step 6: Final answer
    x = 6,970.03

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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.