Home / 20,983.61-28,969.70-13,030.22

Finding the Fourth Proportional to 20,983.61, 28,969.70 and 13,030.22

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Solution

The fourth proportional to 20,983.61, 28,969.70 and 13,030.22 is: 17,989.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.61 : 28,969.70 = 13,030.22 : x
  2. Step 2: Convert to fraction form
    20,983.61/28,969.70 = 13,030.22/x
  3. Step 3: Cross multiply
    20,983.61x = 28,969.70 × 13,030.22
  4. Step 4: Simplify right side
    20,983.61x = 377,481,354.33
  5. Step 5: Solve for x
    x = 377,481,354.33/20,983.61
  6. Step 6: Final answer
    x = 17,989.35

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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.