Home / 20,858.84-28,785.57-11,426.79

Finding the Fourth Proportional to 20,858.84, 28,785.57 and 11,426.79

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Solution

The fourth proportional to 20,858.84, 28,785.57 and 11,426.79 is: 15,769.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.84 : 28,785.57 = 11,426.79 : x
  2. Step 2: Convert to fraction form
    20,858.84/28,785.57 = 11,426.79/x
  3. Step 3: Cross multiply
    20,858.84x = 28,785.57 × 11,426.79
  4. Step 4: Simplify right side
    20,858.84x = 328,926,663.42
  5. Step 5: Solve for x
    x = 328,926,663.42/20,858.84
  6. Step 6: Final answer
    x = 15,769.17

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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.