Home / 20,974.62-28,946.40-11,543.80

Finding the Fourth Proportional to 20,974.62, 28,946.40 and 11,543.80

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Solution

The fourth proportional to 20,974.62, 28,946.40 and 11,543.80 is: 15,931.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.62 : 28,946.40 = 11,543.80 : x
  2. Step 2: Convert to fraction form
    20,974.62/28,946.40 = 11,543.80/x
  3. Step 3: Cross multiply
    20,974.62x = 28,946.40 × 11,543.80
  4. Step 4: Simplify right side
    20,974.62x = 334,151,452.32
  5. Step 5: Solve for x
    x = 334,151,452.32/20,974.62
  6. Step 6: Final answer
    x = 15,931.23

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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.