Home / 20,803.64-28,708.99-11,372.21

Finding the Fourth Proportional to 20,803.64, 28,708.99 and 11,372.21

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Solution

The fourth proportional to 20,803.64, 28,708.99 and 11,372.21 is: 15,693.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.64 : 28,708.99 = 11,372.21 : x
  2. Step 2: Convert to fraction form
    20,803.64/28,708.99 = 11,372.21/x
  3. Step 3: Cross multiply
    20,803.64x = 28,708.99 × 11,372.21
  4. Step 4: Simplify right side
    20,803.64x = 326,484,491.19
  5. Step 5: Solve for x
    x = 326,484,491.19/20,803.64
  6. Step 6: Final answer
    x = 15,693.62

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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.