Home / 30,400.40-41,971.77-20,856.26

Finding the Fourth Proportional to 30,400.40, 41,971.77 and 20,856.26

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Solution

The fourth proportional to 30,400.40, 41,971.77 and 20,856.26 is: 28,794.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,400.40 : 41,971.77 = 20,856.26 : x
  2. Step 2: Convert to fraction form
    30,400.40/41,971.77 = 20,856.26/x
  3. Step 3: Cross multiply
    30,400.40x = 41,971.77 × 20,856.26
  4. Step 4: Simplify right side
    30,400.40x = 875,373,937.92
  5. Step 5: Solve for x
    x = 875,373,937.92/30,400.40
  6. Step 6: Final answer
    x = 28,794.82

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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.