Home / 28,439.09-42,625.43-21,396.49

Finding the Fourth Proportional to 28,439.09, 42,625.43 and 21,396.49

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Solution

The fourth proportional to 28,439.09, 42,625.43 and 21,396.49 is: 32,069.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.09 : 42,625.43 = 21,396.49 : x
  2. Step 2: Convert to fraction form
    28,439.09/42,625.43 = 21,396.49/x
  3. Step 3: Cross multiply
    28,439.09x = 42,625.43 × 21,396.49
  4. Step 4: Simplify right side
    28,439.09x = 912,034,603.17
  5. Step 5: Solve for x
    x = 912,034,603.17/28,439.09
  6. Step 6: Final answer
    x = 32,069.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.