Home / 20,215.02-30,325.90-9,121.46

Finding the Fourth Proportional to 20,215.02, 30,325.90 and 9,121.46

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Solution

The fourth proportional to 20,215.02, 30,325.90 and 9,121.46 is: 13,683.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.02 : 30,325.90 = 9,121.46 : x
  2. Step 2: Convert to fraction form
    20,215.02/30,325.90 = 9,121.46/x
  3. Step 3: Cross multiply
    20,215.02x = 30,325.90 × 9,121.46
  4. Step 4: Simplify right side
    20,215.02x = 276,616,483.81
  5. Step 5: Solve for x
    x = 276,616,483.81/20,215.02
  6. Step 6: Final answer
    x = 13,683.71

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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.