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Finding the Fourth Proportional to 21,696.60, 32,555.70 and 8,549.40

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Solution

The fourth proportional to 21,696.60, 32,555.70 and 8,549.40 is: 12,828.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.60 : 32,555.70 = 8,549.40 : x
  2. Step 2: Convert to fraction form
    21,696.60/32,555.70 = 8,549.40/x
  3. Step 3: Cross multiply
    21,696.60x = 32,555.70 × 8,549.40
  4. Step 4: Simplify right side
    21,696.60x = 278,331,701.58
  5. Step 5: Solve for x
    x = 278,331,701.58/21,696.60
  6. Step 6: Final answer
    x = 12,828.36

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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.