Home / 21,937.08-30,268.34-12,978.44

Finding the Fourth Proportional to 21,937.08, 30,268.34 and 12,978.44

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Solution

The fourth proportional to 21,937.08, 30,268.34 and 12,978.44 is: 17,907.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.08 : 30,268.34 = 12,978.44 : x
  2. Step 2: Convert to fraction form
    21,937.08/30,268.34 = 12,978.44/x
  3. Step 3: Cross multiply
    21,937.08x = 30,268.34 × 12,978.44
  4. Step 4: Simplify right side
    21,937.08x = 392,835,834.59
  5. Step 5: Solve for x
    x = 392,835,834.59/21,937.08
  6. Step 6: Final answer
    x = 17,907.39

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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.