Home / 7,815.77-10,785.67-4,230.65

Finding the Fourth Proportional to 7,815.77, 10,785.67 and 4,230.65

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Solution

The fourth proportional to 7,815.77, 10,785.67 and 4,230.65 is: 5,838.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.77 : 10,785.67 = 4,230.65 : x
  2. Step 2: Convert to fraction form
    7,815.77/10,785.67 = 4,230.65/x
  3. Step 3: Cross multiply
    7,815.77x = 10,785.67 × 4,230.65
  4. Step 4: Simplify right side
    7,815.77x = 45,630,394.79
  5. Step 5: Solve for x
    x = 45,630,394.79/7,815.77
  6. Step 6: Final answer
    x = 5,838.25

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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.