Home / 10,420.56-15,619.80-4,869.21

Finding the Fourth Proportional to 10,420.56, 15,619.80 and 4,869.21

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Solution

The fourth proportional to 10,420.56, 15,619.80 and 4,869.21 is: 7,298.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.56 : 15,619.80 = 4,869.21 : x
  2. Step 2: Convert to fraction form
    10,420.56/15,619.80 = 4,869.21/x
  3. Step 3: Cross multiply
    10,420.56x = 15,619.80 × 4,869.21
  4. Step 4: Simplify right side
    10,420.56x = 76,056,086.36
  5. Step 5: Solve for x
    x = 76,056,086.36/10,420.56
  6. Step 6: Final answer
    x = 7,298.66

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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.