Home / 26,783.40-40,131.36-18,978.24

Finding the Fourth Proportional to 26,783.40, 40,131.36 and 18,978.24

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Solution

The fourth proportional to 26,783.40, 40,131.36 and 18,978.24 is: 28,436.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,783.40 : 40,131.36 = 18,978.24 : x
  2. Step 2: Convert to fraction form
    26,783.40/40,131.36 = 18,978.24/x
  3. Step 3: Cross multiply
    26,783.40x = 40,131.36 × 18,978.24
  4. Step 4: Simplify right side
    26,783.40x = 761,622,581.61
  5. Step 5: Solve for x
    x = 761,622,581.61/26,783.40
  6. Step 6: Final answer
    x = 28,436.37

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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.