Home / 15,391.76-21,240.48-8,585.84

Finding the Fourth Proportional to 15,391.76, 21,240.48 and 8,585.84

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Solution

The fourth proportional to 15,391.76, 21,240.48 and 8,585.84 is: 11,848.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.76 : 21,240.48 = 8,585.84 : x
  2. Step 2: Convert to fraction form
    15,391.76/21,240.48 = 8,585.84/x
  3. Step 3: Cross multiply
    15,391.76x = 21,240.48 × 8,585.84
  4. Step 4: Simplify right side
    15,391.76x = 182,367,362.80
  5. Step 5: Solve for x
    x = 182,367,362.80/15,391.76
  6. Step 6: Final answer
    x = 11,848.38

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Double scale
Find fourth proportional to 15,392.76, 21,241.86 and 8,586.84
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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.