Home / 13,420.22-18,518.55-7,834.46

Finding the Fourth Proportional to 13,420.22, 18,518.55 and 7,834.46

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Solution

The fourth proportional to 13,420.22, 18,518.55 and 7,834.46 is: 10,810.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.22 : 18,518.55 = 7,834.46 : x
  2. Step 2: Convert to fraction form
    13,420.22/18,518.55 = 7,834.46/x
  3. Step 3: Cross multiply
    13,420.22x = 18,518.55 × 7,834.46
  4. Step 4: Simplify right side
    13,420.22x = 145,082,839.23
  5. Step 5: Solve for x
    x = 145,082,839.23/13,420.22
  6. Step 6: Final answer
    x = 10,810.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.