Home / 39,883.34-55,039.38-21,978.99

Finding the Fourth Proportional to 39,883.34, 55,039.38 and 21,978.99

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Solution

The fourth proportional to 39,883.34, 55,039.38 and 21,978.99 is: 30,331.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.34 : 55,039.38 = 21,978.99 : x
  2. Step 2: Convert to fraction form
    39,883.34/55,039.38 = 21,978.99/x
  3. Step 3: Cross multiply
    39,883.34x = 55,039.38 × 21,978.99
  4. Step 4: Simplify right side
    39,883.34x = 1,209,709,900.20
  5. Step 5: Solve for x
    x = 1,209,709,900.20/39,883.34
  6. Step 6: Final answer
    x = 30,331.21

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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.