Home / 20,430.13-30,629.59-9,329.11

Finding the Fourth Proportional to 20,430.13, 30,629.59 and 9,329.11

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Solution

The fourth proportional to 20,430.13, 30,629.59 and 9,329.11 is: 13,986.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.13 : 30,629.59 = 9,329.11 : x
  2. Step 2: Convert to fraction form
    20,430.13/30,629.59 = 9,329.11/x
  3. Step 3: Cross multiply
    20,430.13x = 30,629.59 × 9,329.11
  4. Step 4: Simplify right side
    20,430.13x = 285,746,814.36
  5. Step 5: Solve for x
    x = 285,746,814.36/20,430.13
  6. Step 6: Final answer
    x = 13,986.54

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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.