Home / 15,813.38-21,822.16-8,739.80

Finding the Fourth Proportional to 15,813.38, 21,822.16 and 8,739.80

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Solution

The fourth proportional to 15,813.38, 21,822.16 and 8,739.80 is: 12,060.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.38 : 21,822.16 = 8,739.80 : x
  2. Step 2: Convert to fraction form
    15,813.38/21,822.16 = 8,739.80/x
  3. Step 3: Cross multiply
    15,813.38x = 21,822.16 × 8,739.80
  4. Step 4: Simplify right side
    15,813.38x = 190,721,281.23
  5. Step 5: Solve for x
    x = 190,721,281.23/15,813.38
  6. Step 6: Final answer
    x = 12,060.76

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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.