Home / 7,815.35-10,785.16-4,278.53

Finding the Fourth Proportional to 7,815.35, 10,785.16 and 4,278.53

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Solution

The fourth proportional to 7,815.35, 10,785.16 and 4,278.53 is: 5,904.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.35 : 10,785.16 = 4,278.53 : x
  2. Step 2: Convert to fraction form
    7,815.35/10,785.16 = 4,278.53/x
  3. Step 3: Cross multiply
    7,815.35x = 10,785.16 × 4,278.53
  4. Step 4: Simplify right side
    7,815.35x = 46,144,630.61
  5. Step 5: Solve for x
    x = 46,144,630.61/7,815.35
  6. Step 6: Final answer
    x = 5,904.36

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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.