Home / 20,883.56-28,820.21-11,931.74

Finding the Fourth Proportional to 20,883.56, 28,820.21 and 11,931.74

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Solution

The fourth proportional to 20,883.56, 28,820.21 and 11,931.74 is: 16,466.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.56 : 28,820.21 = 11,931.74 : x
  2. Step 2: Convert to fraction form
    20,883.56/28,820.21 = 11,931.74/x
  3. Step 3: Cross multiply
    20,883.56x = 28,820.21 × 11,931.74
  4. Step 4: Simplify right side
    20,883.56x = 343,875,156.78
  5. Step 5: Solve for x
    x = 343,875,156.78/20,883.56
  6. Step 6: Final answer
    x = 16,466.31

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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.