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Finding the Fourth Proportional to 18,756.91, 25,891.05 and 10,802.31

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Solution

The fourth proportional to 18,756.91, 25,891.05 and 10,802.31 is: 14,910.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.91 : 25,891.05 = 10,802.31 : x
  2. Step 2: Convert to fraction form
    18,756.91/25,891.05 = 10,802.31/x
  3. Step 3: Cross multiply
    18,756.91x = 25,891.05 × 10,802.31
  4. Step 4: Simplify right side
    18,756.91x = 279,683,018.87
  5. Step 5: Solve for x
    x = 279,683,018.87/18,756.91
  6. Step 6: Final answer
    x = 14,910.93

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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.