Home / 30,400.48-41,919.60-19,770.40

Finding the Fourth Proportional to 30,400.48, 41,919.60 and 19,770.40

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Solution

The fourth proportional to 30,400.48, 41,919.60 and 19,770.40 is: 27,261.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,400.48 : 41,919.60 = 19,770.40 : x
  2. Step 2: Convert to fraction form
    30,400.48/41,919.60 = 19,770.40/x
  3. Step 3: Cross multiply
    30,400.48x = 41,919.60 × 19,770.40
  4. Step 4: Simplify right side
    30,400.48x = 828,767,259.84
  5. Step 5: Solve for x
    x = 828,767,259.84/30,400.48
  6. Step 6: Final answer
    x = 27,261.65

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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.