Home / 7,815.17-10,784.94-4,278.40

Finding the Fourth Proportional to 7,815.17, 10,784.94 and 4,278.40

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Solution

The fourth proportional to 7,815.17, 10,784.94 and 4,278.40 is: 5,904.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.17 : 10,784.94 = 4,278.40 : x
  2. Step 2: Convert to fraction form
    7,815.17/10,784.94 = 4,278.40/x
  3. Step 3: Cross multiply
    7,815.17x = 10,784.94 × 4,278.40
  4. Step 4: Simplify right side
    7,815.17x = 46,142,287.30
  5. Step 5: Solve for x
    x = 46,142,287.30/7,815.17
  6. Step 6: Final answer
    x = 5,904.19

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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.