Home / 39,435.36-54,421-21,530.46

Finding the Fourth Proportional to 39,435.36, 54,421 and 21,530.46

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Solution

The fourth proportional to 39,435.36, 54,421 and 21,530.46 is: 29,712.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,435.36 : 54,421 = 21,530.46 : x
  2. Step 2: Convert to fraction form
    39,435.36/54,421 = 21,530.46/x
  3. Step 3: Cross multiply
    39,435.36x = 54,421 × 21,530.46
  4. Step 4: Simplify right side
    39,435.36x = 1,171,709,163.66
  5. Step 5: Solve for x
    x = 1,171,709,163.66/39,435.36
  6. Step 6: Final answer
    x = 29,712.15

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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.