Home / 20,943.60-31,415.40-11,612.40

Finding the Fourth Proportional to 20,943.60, 31,415.40 and 11,612.40

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Solution

The fourth proportional to 20,943.60, 31,415.40 and 11,612.40 is: 17,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.60 : 31,415.40 = 11,612.40 : x
  2. Step 2: Convert to fraction form
    20,943.60/31,415.40 = 11,612.40/x
  3. Step 3: Cross multiply
    20,943.60x = 31,415.40 × 11,612.40
  4. Step 4: Simplify right side
    20,943.60x = 364,808,190.96
  5. Step 5: Solve for x
    x = 364,808,190.96/20,943.60
  6. Step 6: Final answer
    x = 17,418.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.