Home / 5,391.80-8,087.70-5,305.40

Finding the Fourth Proportional to 5,391.80, 8,087.70 and 5,305.40

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Solution

The fourth proportional to 5,391.80, 8,087.70 and 5,305.40 is: 7,958.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.80 : 8,087.70 = 5,305.40 : x
  2. Step 2: Convert to fraction form
    5,391.80/8,087.70 = 5,305.40/x
  3. Step 3: Cross multiply
    5,391.80x = 8,087.70 × 5,305.40
  4. Step 4: Simplify right side
    5,391.80x = 42,908,483.58
  5. Step 5: Solve for x
    x = 42,908,483.58/5,391.80
  6. Step 6: Final answer
    x = 7,958.10

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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.