Home / 20,703.20-31,054.80-18,694.40

Finding the Fourth Proportional to 20,703.20, 31,054.80 and 18,694.40

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Solution

The fourth proportional to 20,703.20, 31,054.80 and 18,694.40 is: 28,041.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.20 : 31,054.80 = 18,694.40 : x
  2. Step 2: Convert to fraction form
    20,703.20/31,054.80 = 18,694.40/x
  3. Step 3: Cross multiply
    20,703.20x = 31,054.80 × 18,694.40
  4. Step 4: Simplify right side
    20,703.20x = 580,550,853.12
  5. Step 5: Solve for x
    x = 580,550,853.12/20,703.20
  6. Step 6: Final answer
    x = 28,041.60

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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.