Home / 20,343-28,065.51-12,786.24

Finding the Fourth Proportional to 20,343, 28,065.51 and 12,786.24

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Solution

The fourth proportional to 20,343, 28,065.51 and 12,786.24 is: 17,640.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343 : 28,065.51 = 12,786.24 : x
  2. Step 2: Convert to fraction form
    20,343/28,065.51 = 12,786.24/x
  3. Step 3: Cross multiply
    20,343x = 28,065.51 × 12,786.24
  4. Step 4: Simplify right side
    20,343x = 358,852,346.58
  5. Step 5: Solve for x
    x = 358,852,346.58/20,343
  6. Step 6: Final answer
    x = 17,640.09

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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.