Home / 20,972.80-28,942.36-11,541.32

Finding the Fourth Proportional to 20,972.80, 28,942.36 and 11,541.32

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Solution

The fourth proportional to 20,972.80, 28,942.36 and 11,541.32 is: 15,926.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.80 : 28,942.36 = 11,541.32 : x
  2. Step 2: Convert to fraction form
    20,972.80/28,942.36 = 11,541.32/x
  3. Step 3: Cross multiply
    20,972.80x = 28,942.36 × 11,541.32
  4. Step 4: Simplify right side
    20,972.80x = 334,033,038.32
  5. Step 5: Solve for x
    x = 334,033,038.32/20,972.80
  6. Step 6: Final answer
    x = 15,926.96

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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.