Home / 30,378.90-41,905.44-18,271.02

Finding the Fourth Proportional to 30,378.90, 41,905.44 and 18,271.02

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Solution

The fourth proportional to 30,378.90, 41,905.44 and 18,271.02 is: 25,203.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,378.90 : 41,905.44 = 18,271.02 : x
  2. Step 2: Convert to fraction form
    30,378.90/41,905.44 = 18,271.02/x
  3. Step 3: Cross multiply
    30,378.90x = 41,905.44 × 18,271.02
  4. Step 4: Simplify right side
    30,378.90x = 765,655,132.35
  5. Step 5: Solve for x
    x = 765,655,132.35/30,378.90
  6. Step 6: Final answer
    x = 25,203.52

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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.