Home / 5,645.12-7,790.40-3,127.40

Finding the Fourth Proportional to 5,645.12, 7,790.40 and 3,127.40

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Solution

The fourth proportional to 5,645.12, 7,790.40 and 3,127.40 is: 4,315.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.12 : 7,790.40 = 3,127.40 : x
  2. Step 2: Convert to fraction form
    5,645.12/7,790.40 = 3,127.40/x
  3. Step 3: Cross multiply
    5,645.12x = 7,790.40 × 3,127.40
  4. Step 4: Simplify right side
    5,645.12x = 24,363,696.96
  5. Step 5: Solve for x
    x = 24,363,696.96/5,645.12
  6. Step 6: Final answer
    x = 4,315.89

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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.