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Finding the Fourth Proportional to 15,294.71, 21,104.79 and 8,579.40

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Solution

The fourth proportional to 15,294.71, 21,104.79 and 8,579.40 is: 11,838.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,294.71 : 21,104.79 = 8,579.40 : x
  2. Step 2: Convert to fraction form
    15,294.71/21,104.79 = 8,579.40/x
  3. Step 3: Cross multiply
    15,294.71x = 21,104.79 × 8,579.40
  4. Step 4: Simplify right side
    15,294.71x = 181,066,435.33
  5. Step 5: Solve for x
    x = 181,066,435.33/15,294.71
  6. Step 6: Final answer
    x = 11,838.50

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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.