Home / 20,533.84-28,335.69-11,581.31

Finding the Fourth Proportional to 20,533.84, 28,335.69 and 11,581.31

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Solution

The fourth proportional to 20,533.84, 28,335.69 and 11,581.31 is: 15,981.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.84 : 28,335.69 = 11,581.31 : x
  2. Step 2: Convert to fraction form
    20,533.84/28,335.69 = 11,581.31/x
  3. Step 3: Cross multiply
    20,533.84x = 28,335.69 × 11,581.31
  4. Step 4: Simplify right side
    20,533.84x = 328,164,480.79
  5. Step 5: Solve for x
    x = 328,164,480.79/20,533.84
  6. Step 6: Final answer
    x = 15,981.64

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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.