Home / 14,253.70-21,380.55-8,640.40

Finding the Fourth Proportional to 14,253.70, 21,380.55 and 8,640.40

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Solution

The fourth proportional to 14,253.70, 21,380.55 and 8,640.40 is: 12,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,253.70 : 21,380.55 = 8,640.40 : x
  2. Step 2: Convert to fraction form
    14,253.70/21,380.55 = 8,640.40/x
  3. Step 3: Cross multiply
    14,253.70x = 21,380.55 × 8,640.40
  4. Step 4: Simplify right side
    14,253.70x = 184,736,504.22
  5. Step 5: Solve for x
    x = 184,736,504.22/14,253.70
  6. Step 6: Final answer
    x = 12,960.60

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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.