Home / 28,415.53-39,213.93-15,840.28

Finding the Fourth Proportional to 28,415.53, 39,213.93 and 15,840.28

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Solution

The fourth proportional to 28,415.53, 39,213.93 and 15,840.28 is: 21,859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.53 : 39,213.93 = 15,840.28 : x
  2. Step 2: Convert to fraction form
    28,415.53/39,213.93 = 15,840.28/x
  3. Step 3: Cross multiply
    28,415.53x = 39,213.93 × 15,840.28
  4. Step 4: Simplify right side
    28,415.53x = 621,159,631.10
  5. Step 5: Solve for x
    x = 621,159,631.10/28,415.53
  6. Step 6: Final answer
    x = 21,859.86

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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.