Home / 20,702.08-28,574.40-12,321.28

Finding the Fourth Proportional to 20,702.08, 28,574.40 and 12,321.28

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Solution

The fourth proportional to 20,702.08, 28,574.40 and 12,321.28 is: 17,006.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.08 : 28,574.40 = 12,321.28 : x
  2. Step 2: Convert to fraction form
    20,702.08/28,574.40 = 12,321.28/x
  3. Step 3: Cross multiply
    20,702.08x = 28,574.40 × 12,321.28
  4. Step 4: Simplify right side
    20,702.08x = 352,073,183.23
  5. Step 5: Solve for x
    x = 352,073,183.23/20,702.08
  6. Step 6: Final answer
    x = 17,006.66

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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.