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Finding the Fourth Proportional to 19,953.76, 29,914.32 and 8,260.64

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Solution

The fourth proportional to 19,953.76, 29,914.32 and 8,260.64 is: 12,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953.76 : 29,914.32 = 8,260.64 : x
  2. Step 2: Convert to fraction form
    19,953.76/29,914.32 = 8,260.64/x
  3. Step 3: Cross multiply
    19,953.76x = 29,914.32 × 8,260.64
  4. Step 4: Simplify right side
    19,953.76x = 247,111,428.36
  5. Step 5: Solve for x
    x = 247,111,428.36/19,953.76
  6. Step 6: Final answer
    x = 12,384.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.