Home / 20,280.57-27,986.93-11,328.45

Finding the Fourth Proportional to 20,280.57, 27,986.93 and 11,328.45

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Solution

The fourth proportional to 20,280.57, 27,986.93 and 11,328.45 is: 15,633.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.57 : 27,986.93 = 11,328.45 : x
  2. Step 2: Convert to fraction form
    20,280.57/27,986.93 = 11,328.45/x
  3. Step 3: Cross multiply
    20,280.57x = 27,986.93 × 11,328.45
  4. Step 4: Simplify right side
    20,280.57x = 317,048,537.16
  5. Step 5: Solve for x
    x = 317,048,537.16/20,280.57
  6. Step 6: Final answer
    x = 15,633.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.