Home / 20,653.05-28,501.28-11,702.21

Finding the Fourth Proportional to 20,653.05, 28,501.28 and 11,702.21

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Solution

The fourth proportional to 20,653.05, 28,501.28 and 11,702.21 is: 16,149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.05 : 28,501.28 = 11,702.21 : x
  2. Step 2: Convert to fraction form
    20,653.05/28,501.28 = 11,702.21/x
  3. Step 3: Cross multiply
    20,653.05x = 28,501.28 × 11,702.21
  4. Step 4: Simplify right side
    20,653.05x = 333,527,963.83
  5. Step 5: Solve for x
    x = 333,527,963.83/20,653.05
  6. Step 6: Final answer
    x = 16,149.09

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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.