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Finding the Fourth Proportional to 19,364.70, 26,722.80 and 10,981.20

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Solution

The fourth proportional to 19,364.70, 26,722.80 and 10,981.20 is: 15,153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,364.70 : 26,722.80 = 10,981.20 : x
  2. Step 2: Convert to fraction form
    19,364.70/26,722.80 = 10,981.20/x
  3. Step 3: Cross multiply
    19,364.70x = 26,722.80 × 10,981.20
  4. Step 4: Simplify right side
    19,364.70x = 293,448,411.36
  5. Step 5: Solve for x
    x = 293,448,411.36/19,364.70
  6. Step 6: Final answer
    x = 15,153.78

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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.