Home / 13,813.72-20,705.10-5,487.40

Finding the Fourth Proportional to 13,813.72, 20,705.10 and 5,487.40

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Solution

The fourth proportional to 13,813.72, 20,705.10 and 5,487.40 is: 8,224.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.72 : 20,705.10 = 5,487.40 : x
  2. Step 2: Convert to fraction form
    13,813.72/20,705.10 = 5,487.40/x
  3. Step 3: Cross multiply
    13,813.72x = 20,705.10 × 5,487.40
  4. Step 4: Simplify right side
    13,813.72x = 113,617,165.74
  5. Step 5: Solve for x
    x = 113,617,165.74/13,813.72
  6. Step 6: Final answer
    x = 8,224.95

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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.