Home / 20,968.05-28,935.45-12,020.82

Finding the Fourth Proportional to 20,968.05, 28,935.45 and 12,020.82

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Solution

The fourth proportional to 20,968.05, 28,935.45 and 12,020.82 is: 16,588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.05 : 28,935.45 = 12,020.82 : x
  2. Step 2: Convert to fraction form
    20,968.05/28,935.45 = 12,020.82/x
  3. Step 3: Cross multiply
    20,968.05x = 28,935.45 × 12,020.82
  4. Step 4: Simplify right side
    20,968.05x = 347,827,836.07
  5. Step 5: Solve for x
    x = 347,827,836.07/20,968.05
  6. Step 6: Final answer
    x = 16,588.47

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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.