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Finding the Fourth Proportional to 15,696.99, 21,661.74 and 8,526.84

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Solution

The fourth proportional to 15,696.99, 21,661.74 and 8,526.84 is: 11,766.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,696.99 : 21,661.74 = 8,526.84 : x
  2. Step 2: Convert to fraction form
    15,696.99/21,661.74 = 8,526.84/x
  3. Step 3: Cross multiply
    15,696.99x = 21,661.74 × 8,526.84
  4. Step 4: Simplify right side
    15,696.99x = 184,706,191.10
  5. Step 5: Solve for x
    x = 184,706,191.10/15,696.99
  6. Step 6: Final answer
    x = 11,766.98

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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.