Home / 20,710.81-28,583.73-12,215.33

Finding the Fourth Proportional to 20,710.81, 28,583.73 and 12,215.33

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Solution

The fourth proportional to 20,710.81, 28,583.73 and 12,215.33 is: 16,858.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.81 : 28,583.73 = 12,215.33 : x
  2. Step 2: Convert to fraction form
    20,710.81/28,583.73 = 12,215.33/x
  3. Step 3: Cross multiply
    20,710.81x = 28,583.73 × 12,215.33
  4. Step 4: Simplify right side
    20,710.81x = 349,159,694.58
  5. Step 5: Solve for x
    x = 349,159,694.58/20,710.81
  6. Step 6: Final answer
    x = 16,858.82

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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.