Home / 22,128.36-30,507.28-21,440.40

Finding the Fourth Proportional to 22,128.36, 30,507.28 and 21,440.40

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Solution

The fourth proportional to 22,128.36, 30,507.28 and 21,440.40 is: 29,558.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,128.36 : 30,507.28 = 21,440.40 : x
  2. Step 2: Convert to fraction form
    22,128.36/30,507.28 = 21,440.40/x
  3. Step 3: Cross multiply
    22,128.36x = 30,507.28 × 21,440.40
  4. Step 4: Simplify right side
    22,128.36x = 654,088,286.11
  5. Step 5: Solve for x
    x = 654,088,286.11/22,128.36
  6. Step 6: Final answer
    x = 29,558.82

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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.