Home / 19,313.10-28,969.65-13,408.20

Finding the Fourth Proportional to 19,313.10, 28,969.65 and 13,408.20

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Solution

The fourth proportional to 19,313.10, 28,969.65 and 13,408.20 is: 20,112.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.10 : 28,969.65 = 13,408.20 : x
  2. Step 2: Convert to fraction form
    19,313.10/28,969.65 = 13,408.20/x
  3. Step 3: Cross multiply
    19,313.10x = 28,969.65 × 13,408.20
  4. Step 4: Simplify right side
    19,313.10x = 388,430,861.13
  5. Step 5: Solve for x
    x = 388,430,861.13/19,313.10
  6. Step 6: Final answer
    x = 20,112.30

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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.