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Finding the Fourth Proportional to 15,076.91, 20,802.80 and 8,702.14

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Solution

The fourth proportional to 15,076.91, 20,802.80 and 8,702.14 is: 12,007.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,076.91 : 20,802.80 = 8,702.14 : x
  2. Step 2: Convert to fraction form
    15,076.91/20,802.80 = 8,702.14/x
  3. Step 3: Cross multiply
    15,076.91x = 20,802.80 × 8,702.14
  4. Step 4: Simplify right side
    15,076.91x = 181,028,877.99
  5. Step 5: Solve for x
    x = 181,028,877.99/15,076.91
  6. Step 6: Final answer
    x = 12,007.03

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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.