Home / 40,137.34-55,388.90-21,987.92

Finding the Fourth Proportional to 40,137.34, 55,388.90 and 21,987.92

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Solution

The fourth proportional to 40,137.34, 55,388.90 and 21,987.92 is: 30,342.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,137.34 : 55,388.90 = 21,987.92 : x
  2. Step 2: Convert to fraction form
    40,137.34/55,388.90 = 21,987.92/x
  3. Step 3: Cross multiply
    40,137.34x = 55,388.90 × 21,987.92
  4. Step 4: Simplify right side
    40,137.34x = 1,217,886,702.09
  5. Step 5: Solve for x
    x = 1,217,886,702.09/40,137.34
  6. Step 6: Final answer
    x = 30,342.98

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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.