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Finding the Fourth Proportional to 15,661.84, 21,619.56 and 9,373

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Solution

The fourth proportional to 15,661.84, 21,619.56 and 9,373 is: 12,938.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.84 : 21,619.56 = 9,373 : x
  2. Step 2: Convert to fraction form
    15,661.84/21,619.56 = 9,373/x
  3. Step 3: Cross multiply
    15,661.84x = 21,619.56 × 9,373
  4. Step 4: Simplify right side
    15,661.84x = 202,640,135.88
  5. Step 5: Solve for x
    x = 202,640,135.88/15,661.84
  6. Step 6: Final answer
    x = 12,938.46

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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.