Home / 15,495.31-21,383.44-8,782.21

Finding the Fourth Proportional to 15,495.31, 21,383.44 and 8,782.21

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Solution

The fourth proportional to 15,495.31, 21,383.44 and 8,782.21 is: 12,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.31 : 21,383.44 = 8,782.21 : x
  2. Step 2: Convert to fraction form
    15,495.31/21,383.44 = 8,782.21/x
  3. Step 3: Cross multiply
    15,495.31x = 21,383.44 × 8,782.21
  4. Step 4: Simplify right side
    15,495.31x = 187,793,794.49
  5. Step 5: Solve for x
    x = 187,793,794.49/15,495.31
  6. Step 6: Final answer
    x = 12,119.40

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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.