Home / 21,331.35-31,839.03-20,018.07

Finding the Fourth Proportional to 21,331.35, 31,839.03 and 20,018.07

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Solution

The fourth proportional to 21,331.35, 31,839.03 and 20,018.07 is: 29,878.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.35 : 31,839.03 = 20,018.07 : x
  2. Step 2: Convert to fraction form
    21,331.35/31,839.03 = 20,018.07/x
  3. Step 3: Cross multiply
    21,331.35x = 31,839.03 × 20,018.07
  4. Step 4: Simplify right side
    21,331.35x = 637,355,931.27
  5. Step 5: Solve for x
    x = 637,355,931.27/21,331.35
  6. Step 6: Final answer
    x = 29,878.84

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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.