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Finding the Fourth Proportional to 12,695.88, 17,520.21 and 7,316.35

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Solution

The fourth proportional to 12,695.88, 17,520.21 and 7,316.35 is: 10,096.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.88 : 17,520.21 = 7,316.35 : x
  2. Step 2: Convert to fraction form
    12,695.88/17,520.21 = 7,316.35/x
  3. Step 3: Cross multiply
    12,695.88x = 17,520.21 × 7,316.35
  4. Step 4: Simplify right side
    12,695.88x = 128,183,957.90
  5. Step 5: Solve for x
    x = 128,183,957.90/12,695.88
  6. Step 6: Final answer
    x = 10,096.50

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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.