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Finding the Fourth Proportional to 15,092.93, 20,828.47 and 8,378.99

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Solution

The fourth proportional to 15,092.93, 20,828.47 and 8,378.99 is: 11,563.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,092.93 : 20,828.47 = 8,378.99 : x
  2. Step 2: Convert to fraction form
    15,092.93/20,828.47 = 8,378.99/x
  3. Step 3: Cross multiply
    15,092.93x = 20,828.47 × 8,378.99
  4. Step 4: Simplify right side
    15,092.93x = 174,521,416.76
  5. Step 5: Solve for x
    x = 174,521,416.76/15,092.93
  6. Step 6: Final answer
    x = 11,563.13

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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.