Home / 20,798.06-28,702.35-12,305.16

Finding the Fourth Proportional to 20,798.06, 28,702.35 and 12,305.16

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Solution

The fourth proportional to 20,798.06, 28,702.35 and 12,305.16 is: 16,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.06 : 28,702.35 = 12,305.16 : x
  2. Step 2: Convert to fraction form
    20,798.06/28,702.35 = 12,305.16/x
  3. Step 3: Cross multiply
    20,798.06x = 28,702.35 × 12,305.16
  4. Step 4: Simplify right side
    20,798.06x = 353,187,009.13
  5. Step 5: Solve for x
    x = 353,187,009.13/20,798.06
  6. Step 6: Final answer
    x = 16,981.73

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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.