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Finding the Fourth Proportional to 9,153.75, 13,734.71 and 4,220.74

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Solution

The fourth proportional to 9,153.75, 13,734.71 and 4,220.74 is: 6,332.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,153.75 : 13,734.71 = 4,220.74 : x
  2. Step 2: Convert to fraction form
    9,153.75/13,734.71 = 4,220.74/x
  3. Step 3: Cross multiply
    9,153.75x = 13,734.71 × 4,220.74
  4. Step 4: Simplify right side
    9,153.75x = 57,970,639.89
  5. Step 5: Solve for x
    x = 57,970,639.89/9,153.75
  6. Step 6: Final answer
    x = 6,332.99

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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.