Home / 7,477.85-10,319.38-4,120.70

Finding the Fourth Proportional to 7,477.85, 10,319.38 and 4,120.70

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Solution

The fourth proportional to 7,477.85, 10,319.38 and 4,120.70 is: 5,686.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,477.85 : 10,319.38 = 4,120.70 : x
  2. Step 2: Convert to fraction form
    7,477.85/10,319.38 = 4,120.70/x
  3. Step 3: Cross multiply
    7,477.85x = 10,319.38 × 4,120.70
  4. Step 4: Simplify right side
    7,477.85x = 42,523,007.27
  5. Step 5: Solve for x
    x = 42,523,007.27/7,477.85
  6. Step 6: Final answer
    x = 5,686.53

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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.