Home / 19,320.09-26,660.21-10,821.55

Finding the Fourth Proportional to 19,320.09, 26,660.21 and 10,821.55

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Solution

The fourth proportional to 19,320.09, 26,660.21 and 10,821.55 is: 14,932.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320.09 : 26,660.21 = 10,821.55 : x
  2. Step 2: Convert to fraction form
    19,320.09/26,660.21 = 10,821.55/x
  3. Step 3: Cross multiply
    19,320.09x = 26,660.21 × 10,821.55
  4. Step 4: Simplify right side
    19,320.09x = 288,504,816.06
  5. Step 5: Solve for x
    x = 288,504,816.06/19,320.09
  6. Step 6: Final answer
    x = 14,932.89

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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.