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Finding the Fourth Proportional to 15,456.84, 21,329.01 and 8,743.05

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Solution

The fourth proportional to 15,456.84, 21,329.01 and 8,743.05 is: 12,064.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.84 : 21,329.01 = 8,743.05 : x
  2. Step 2: Convert to fraction form
    15,456.84/21,329.01 = 8,743.05/x
  3. Step 3: Cross multiply
    15,456.84x = 21,329.01 × 8,743.05
  4. Step 4: Simplify right side
    15,456.84x = 186,480,600.88
  5. Step 5: Solve for x
    x = 186,480,600.88/15,456.84
  6. Step 6: Final answer
    x = 12,064.60

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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.