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Finding the Fourth Proportional to 15,770.70, 21,763.08 and 8,696.70

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Solution

The fourth proportional to 15,770.70, 21,763.08 and 8,696.70 is: 12,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,770.70 : 21,763.08 = 8,696.70 : x
  2. Step 2: Convert to fraction form
    15,770.70/21,763.08 = 8,696.70/x
  3. Step 3: Cross multiply
    15,770.70x = 21,763.08 × 8,696.70
  4. Step 4: Simplify right side
    15,770.70x = 189,266,977.84
  5. Step 5: Solve for x
    x = 189,266,977.84/15,770.70
  6. Step 6: Final answer
    x = 12,001.18

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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.