Home / 20,868.40-28,798.23-11,436.94

Finding the Fourth Proportional to 20,868.40, 28,798.23 and 11,436.94

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Solution

The fourth proportional to 20,868.40, 28,798.23 and 11,436.94 is: 15,782.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.40 : 28,798.23 = 11,436.94 : x
  2. Step 2: Convert to fraction form
    20,868.40/28,798.23 = 11,436.94/x
  3. Step 3: Cross multiply
    20,868.40x = 28,798.23 × 11,436.94
  4. Step 4: Simplify right side
    20,868.40x = 329,363,628.62
  5. Step 5: Solve for x
    x = 329,363,628.62/20,868.40
  6. Step 6: Final answer
    x = 15,782.89

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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.