Home / 15,840.20-21,858.71-8,766.47

Finding the Fourth Proportional to 15,840.20, 21,858.71 and 8,766.47

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Solution

The fourth proportional to 15,840.20, 21,858.71 and 8,766.47 is: 12,097.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,840.20 : 21,858.71 = 8,766.47 : x
  2. Step 2: Convert to fraction form
    15,840.20/21,858.71 = 8,766.47/x
  3. Step 3: Cross multiply
    15,840.20x = 21,858.71 × 8,766.47
  4. Step 4: Simplify right side
    15,840.20x = 191,623,572.33
  5. Step 5: Solve for x
    x = 191,623,572.33/15,840.20
  6. Step 6: Final answer
    x = 12,097.30

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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.