Home / 20,658.89-28,509.71-11,228.06

Finding the Fourth Proportional to 20,658.89, 28,509.71 and 11,228.06

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Solution

The fourth proportional to 20,658.89, 28,509.71 and 11,228.06 is: 15,494.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.89 : 28,509.71 = 11,228.06 : x
  2. Step 2: Convert to fraction form
    20,658.89/28,509.71 = 11,228.06/x
  3. Step 3: Cross multiply
    20,658.89x = 28,509.71 × 11,228.06
  4. Step 4: Simplify right side
    20,658.89x = 320,108,535.77
  5. Step 5: Solve for x
    x = 320,108,535.77/20,658.89
  6. Step 6: Final answer
    x = 15,494.96

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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.