Home / 20,913.41-31,219.68-17,919.62

Finding the Fourth Proportional to 20,913.41, 31,219.68 and 17,919.62

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Solution

The fourth proportional to 20,913.41, 31,219.68 and 17,919.62 is: 26,750.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.41 : 31,219.68 = 17,919.62 : x
  2. Step 2: Convert to fraction form
    20,913.41/31,219.68 = 17,919.62/x
  3. Step 3: Cross multiply
    20,913.41x = 31,219.68 × 17,919.62
  4. Step 4: Simplify right side
    20,913.41x = 559,444,646.02
  5. Step 5: Solve for x
    x = 559,444,646.02/20,913.41
  6. Step 6: Final answer
    x = 26,750.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.