Home / 20,783.43-28,681.02-11,351.94

Finding the Fourth Proportional to 20,783.43, 28,681.02 and 11,351.94

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Solution

The fourth proportional to 20,783.43, 28,681.02 and 11,351.94 is: 15,665.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.43 : 28,681.02 = 11,351.94 : x
  2. Step 2: Convert to fraction form
    20,783.43/28,681.02 = 11,351.94/x
  3. Step 3: Cross multiply
    20,783.43x = 28,681.02 × 11,351.94
  4. Step 4: Simplify right side
    20,783.43x = 325,585,218.18
  5. Step 5: Solve for x
    x = 325,585,218.18/20,783.43
  6. Step 6: Final answer
    x = 15,665.62

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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.