Home / 28,415.58-39,216.15-15,840.06

Finding the Fourth Proportional to 28,415.58, 39,216.15 and 15,840.06

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Solution

The fourth proportional to 28,415.58, 39,216.15 and 15,840.06 is: 21,860.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.58 : 39,216.15 = 15,840.06 : x
  2. Step 2: Convert to fraction form
    28,415.58/39,216.15 = 15,840.06/x
  3. Step 3: Cross multiply
    28,415.58x = 39,216.15 × 15,840.06
  4. Step 4: Simplify right side
    28,415.58x = 621,186,168.97
  5. Step 5: Solve for x
    x = 621,186,168.97/28,415.58
  6. Step 6: Final answer
    x = 21,860.76

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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.