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Finding the Fourth Proportional to 14,978.79, 20,670.39 and 8,264.97

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Solution

The fourth proportional to 14,978.79, 20,670.39 and 8,264.97 is: 11,405.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.79 : 20,670.39 = 8,264.97 : x
  2. Step 2: Convert to fraction form
    14,978.79/20,670.39 = 8,264.97/x
  3. Step 3: Cross multiply
    14,978.79x = 20,670.39 × 8,264.97
  4. Step 4: Simplify right side
    14,978.79x = 170,840,153.24
  5. Step 5: Solve for x
    x = 170,840,153.24/14,978.79
  6. Step 6: Final answer
    x = 11,405.47

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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.