Home / 20,917.70-28,866.36-12,534.20

Finding the Fourth Proportional to 20,917.70, 28,866.36 and 12,534.20

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Solution

The fourth proportional to 20,917.70, 28,866.36 and 12,534.20 is: 17,297.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.70 : 28,866.36 = 12,534.20 : x
  2. Step 2: Convert to fraction form
    20,917.70/28,866.36 = 12,534.20/x
  3. Step 3: Cross multiply
    20,917.70x = 28,866.36 × 12,534.20
  4. Step 4: Simplify right side
    20,917.70x = 361,816,522.51
  5. Step 5: Solve for x
    x = 361,816,522.51/20,917.70
  6. Step 6: Final answer
    x = 17,297.15

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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.