Home / 13,810.20-20,715.30-5,487.45

Finding the Fourth Proportional to 13,810.20, 20,715.30 and 5,487.45

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Solution

The fourth proportional to 13,810.20, 20,715.30 and 5,487.45 is: 8,231.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,810.20 : 20,715.30 = 5,487.45 : x
  2. Step 2: Convert to fraction form
    13,810.20/20,715.30 = 5,487.45/x
  3. Step 3: Cross multiply
    13,810.20x = 20,715.30 × 5,487.45
  4. Step 4: Simplify right side
    13,810.20x = 113,674,172.99
  5. Step 5: Solve for x
    x = 113,674,172.99/13,810.20
  6. Step 6: Final answer
    x = 8,231.18

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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.