Home / 20,818.26-31,214.43-9,720.18

Finding the Fourth Proportional to 20,818.26, 31,214.43 and 9,720.18

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Solution

The fourth proportional to 20,818.26, 31,214.43 and 9,720.18 is: 14,574.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.26 : 31,214.43 = 9,720.18 : x
  2. Step 2: Convert to fraction form
    20,818.26/31,214.43 = 9,720.18/x
  3. Step 3: Cross multiply
    20,818.26x = 31,214.43 × 9,720.18
  4. Step 4: Simplify right side
    20,818.26x = 303,409,878.20
  5. Step 5: Solve for x
    x = 303,409,878.20/20,818.26
  6. Step 6: Final answer
    x = 14,574.22

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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.