Home / 20,365.40-30,528.95-10,991.37

Finding the Fourth Proportional to 20,365.40, 30,528.95 and 10,991.37

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Solution

The fourth proportional to 20,365.40, 30,528.95 and 10,991.37 is: 16,476.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.40 : 30,528.95 = 10,991.37 : x
  2. Step 2: Convert to fraction form
    20,365.40/30,528.95 = 10,991.37/x
  3. Step 3: Cross multiply
    20,365.40x = 30,528.95 × 10,991.37
  4. Step 4: Simplify right side
    20,365.40x = 335,554,930.20
  5. Step 5: Solve for x
    x = 335,554,930.20/20,365.40
  6. Step 6: Final answer
    x = 16,476.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.