Home / 15,864.08-21,890.72-8,789.80

Finding the Fourth Proportional to 15,864.08, 21,890.72 and 8,789.80

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Solution

The fourth proportional to 15,864.08, 21,890.72 and 8,789.80 is: 12,128.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.08 : 21,890.72 = 8,789.80 : x
  2. Step 2: Convert to fraction form
    15,864.08/21,890.72 = 8,789.80/x
  3. Step 3: Cross multiply
    15,864.08x = 21,890.72 × 8,789.80
  4. Step 4: Simplify right side
    15,864.08x = 192,415,050.66
  5. Step 5: Solve for x
    x = 192,415,050.66/15,864.08
  6. Step 6: Final answer
    x = 12,128.98

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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.