Home / 28,139.25-42,208.47-8,417.37

Finding the Fourth Proportional to 28,139.25, 42,208.47 and 8,417.37

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Solution

The fourth proportional to 28,139.25, 42,208.47 and 8,417.37 is: 12,625.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.25 : 42,208.47 = 8,417.37 : x
  2. Step 2: Convert to fraction form
    28,139.25/42,208.47 = 8,417.37/x
  3. Step 3: Cross multiply
    28,139.25x = 42,208.47 × 8,417.37
  4. Step 4: Simplify right side
    28,139.25x = 355,284,309.12
  5. Step 5: Solve for x
    x = 355,284,309.12/28,139.25
  6. Step 6: Final answer
    x = 12,625.93

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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.