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Finding the Fourth Proportional to 21,804.75, 30,091.53 and 12,852.63

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Solution

The fourth proportional to 21,804.75, 30,091.53 and 12,852.63 is: 17,737.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,804.75 : 30,091.53 = 12,852.63 : x
  2. Step 2: Convert to fraction form
    21,804.75/30,091.53 = 12,852.63/x
  3. Step 3: Cross multiply
    21,804.75x = 30,091.53 × 12,852.63
  4. Step 4: Simplify right side
    21,804.75x = 386,755,301.22
  5. Step 5: Solve for x
    x = 386,755,301.22/21,804.75
  6. Step 6: Final answer
    x = 17,737.20

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Double scale
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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.