Home / 21,828.32-30,123.24-11,892.32

Finding the Fourth Proportional to 21,828.32, 30,123.24 and 11,892.32

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Solution

The fourth proportional to 21,828.32, 30,123.24 and 11,892.32 is: 16,411.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.32 : 30,123.24 = 11,892.32 : x
  2. Step 2: Convert to fraction form
    21,828.32/30,123.24 = 11,892.32/x
  3. Step 3: Cross multiply
    21,828.32x = 30,123.24 × 11,892.32
  4. Step 4: Simplify right side
    21,828.32x = 358,235,209.52
  5. Step 5: Solve for x
    x = 358,235,209.52/21,828.32
  6. Step 6: Final answer
    x = 16,411.49

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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.