Home / 20,939.18-28,895.74-11,507.54

Finding the Fourth Proportional to 20,939.18, 28,895.74 and 11,507.54

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Solution

The fourth proportional to 20,939.18, 28,895.74 and 11,507.54 is: 15,880.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.18 : 28,895.74 = 11,507.54 : x
  2. Step 2: Convert to fraction form
    20,939.18/28,895.74 = 11,507.54/x
  3. Step 3: Cross multiply
    20,939.18x = 28,895.74 × 11,507.54
  4. Step 4: Simplify right side
    20,939.18x = 332,518,710.63
  5. Step 5: Solve for x
    x = 332,518,710.63/20,939.18
  6. Step 6: Final answer
    x = 15,880.22

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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.