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Finding the Fourth Proportional to 9,811.70, 14,695.95 and 8,515.70

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Solution

The fourth proportional to 9,811.70, 14,695.95 and 8,515.70 is: 12,754.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,811.70 : 14,695.95 = 8,515.70 : x
  2. Step 2: Convert to fraction form
    9,811.70/14,695.95 = 8,515.70/x
  3. Step 3: Cross multiply
    9,811.70x = 14,695.95 × 8,515.70
  4. Step 4: Simplify right side
    9,811.70x = 125,146,301.42
  5. Step 5: Solve for x
    x = 125,146,301.42/9,811.70
  6. Step 6: Final answer
    x = 12,754.80

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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.