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Finding the Fourth Proportional to 15,802.57, 21,806.85 and 8,728.84

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Solution

The fourth proportional to 15,802.57, 21,806.85 and 8,728.84 is: 12,045.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,802.57 : 21,806.85 = 8,728.84 : x
  2. Step 2: Convert to fraction form
    15,802.57/21,806.85 = 8,728.84/x
  3. Step 3: Cross multiply
    15,802.57x = 21,806.85 × 8,728.84
  4. Step 4: Simplify right side
    15,802.57x = 190,348,504.55
  5. Step 5: Solve for x
    x = 190,348,504.55/15,802.57
  6. Step 6: Final answer
    x = 12,045.41

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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.