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Finding the Fourth Proportional to 15,638.81, 21,577.25 and 8,922.02

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Solution

The fourth proportional to 15,638.81, 21,577.25 and 8,922.02 is: 12,309.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.81 : 21,577.25 = 8,922.02 : x
  2. Step 2: Convert to fraction form
    15,638.81/21,577.25 = 8,922.02/x
  3. Step 3: Cross multiply
    15,638.81x = 21,577.25 × 8,922.02
  4. Step 4: Simplify right side
    15,638.81x = 192,512,570.46
  5. Step 5: Solve for x
    x = 192,512,570.46/15,638.81
  6. Step 6: Final answer
    x = 12,309.93

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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.