Home / 28,364.14-39,143.34-15,618.64

Finding the Fourth Proportional to 28,364.14, 39,143.34 and 15,618.64

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Solution

The fourth proportional to 28,364.14, 39,143.34 and 15,618.64 is: 21,554.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.14 : 39,143.34 = 15,618.64 : x
  2. Step 2: Convert to fraction form
    28,364.14/39,143.34 = 15,618.64/x
  3. Step 3: Cross multiply
    28,364.14x = 39,143.34 × 15,618.64
  4. Step 4: Simplify right side
    28,364.14x = 611,365,735.86
  5. Step 5: Solve for x
    x = 611,365,735.86/28,364.14
  6. Step 6: Final answer
    x = 21,554.18

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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.