Home / 13,856.40-20,772.96-6,457.02

Finding the Fourth Proportional to 13,856.40, 20,772.96 and 6,457.02

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Solution

The fourth proportional to 13,856.40, 20,772.96 and 6,457.02 is: 9,680.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.40 : 20,772.96 = 6,457.02 : x
  2. Step 2: Convert to fraction form
    13,856.40/20,772.96 = 6,457.02/x
  3. Step 3: Cross multiply
    13,856.40x = 20,772.96 × 6,457.02
  4. Step 4: Simplify right side
    13,856.40x = 134,131,418.18
  5. Step 5: Solve for x
    x = 134,131,418.18/13,856.40
  6. Step 6: Final answer
    x = 9,680.11

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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.