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Finding the Fourth Proportional to 15,798.78, 21,802.18 and 8,724.76

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Solution

The fourth proportional to 15,798.78, 21,802.18 and 8,724.76 is: 12,040.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,798.78 : 21,802.18 = 8,724.76 : x
  2. Step 2: Convert to fraction form
    15,798.78/21,802.18 = 8,724.76/x
  3. Step 3: Cross multiply
    15,798.78x = 21,802.18 × 8,724.76
  4. Step 4: Simplify right side
    15,798.78x = 190,218,787.98
  5. Step 5: Solve for x
    x = 190,218,787.98/15,798.78
  6. Step 6: Final answer
    x = 12,040.09

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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.