Home / 21,189.48-31,782.81-8,706.27

Finding the Fourth Proportional to 21,189.48, 31,782.81 and 8,706.27

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Solution

The fourth proportional to 21,189.48, 31,782.81 and 8,706.27 is: 13,058.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.48 : 31,782.81 = 8,706.27 : x
  2. Step 2: Convert to fraction form
    21,189.48/31,782.81 = 8,706.27/x
  3. Step 3: Cross multiply
    21,189.48x = 31,782.81 × 8,706.27
  4. Step 4: Simplify right side
    21,189.48x = 276,709,725.22
  5. Step 5: Solve for x
    x = 276,709,725.22/21,189.48
  6. Step 6: Final answer
    x = 13,058.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.