Home / 21,208.27-31,763.18-20,470.18

Finding the Fourth Proportional to 21,208.27, 31,763.18 and 20,470.18

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Solution

The fourth proportional to 21,208.27, 31,763.18 and 20,470.18 is: 30,657.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.27 : 31,763.18 = 20,470.18 : x
  2. Step 2: Convert to fraction form
    21,208.27/31,763.18 = 20,470.18/x
  3. Step 3: Cross multiply
    21,208.27x = 31,763.18 × 20,470.18
  4. Step 4: Simplify right side
    21,208.27x = 650,197,909.62
  5. Step 5: Solve for x
    x = 650,197,909.62/21,208.27
  6. Step 6: Final answer
    x = 30,657.75

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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.