Home / 20,331.90-28,058.37-11,378.34

Finding the Fourth Proportional to 20,331.90, 28,058.37 and 11,378.34

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Solution

The fourth proportional to 20,331.90, 28,058.37 and 11,378.34 is: 15,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.90 : 28,058.37 = 11,378.34 : x
  2. Step 2: Convert to fraction form
    20,331.90/28,058.37 = 11,378.34/x
  3. Step 3: Cross multiply
    20,331.90x = 28,058.37 × 11,378.34
  4. Step 4: Simplify right side
    20,331.90x = 319,257,673.71
  5. Step 5: Solve for x
    x = 319,257,673.71/20,331.90
  6. Step 6: Final answer
    x = 15,702.30

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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.