Home / 20,506.78-30,749.23-10,621.54

Finding the Fourth Proportional to 20,506.78, 30,749.23 and 10,621.54

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Solution

The fourth proportional to 20,506.78, 30,749.23 and 10,621.54 is: 15,926.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.78 : 30,749.23 = 10,621.54 : x
  2. Step 2: Convert to fraction form
    20,506.78/30,749.23 = 10,621.54/x
  3. Step 3: Cross multiply
    20,506.78x = 30,749.23 × 10,621.54
  4. Step 4: Simplify right side
    20,506.78x = 326,604,176.41
  5. Step 5: Solve for x
    x = 326,604,176.41/20,506.78
  6. Step 6: Final answer
    x = 15,926.64

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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.