Home / 28,383.95-39,168.80-15,808.43

Finding the Fourth Proportional to 28,383.95, 39,168.80 and 15,808.43

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Solution

The fourth proportional to 28,383.95, 39,168.80 and 15,808.43 is: 21,815.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,383.95 : 39,168.80 = 15,808.43 : x
  2. Step 2: Convert to fraction form
    28,383.95/39,168.80 = 15,808.43/x
  3. Step 3: Cross multiply
    28,383.95x = 39,168.80 × 15,808.43
  4. Step 4: Simplify right side
    28,383.95x = 619,197,153.94
  5. Step 5: Solve for x
    x = 619,197,153.94/28,383.95
  6. Step 6: Final answer
    x = 21,815.05

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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.