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Finding the Fourth Proportional to 7,810.89, 10,779 and 4,274.09

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Solution

The fourth proportional to 7,810.89, 10,779 and 4,274.09 is: 5,898.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810.89 : 10,779 = 4,274.09 : x
  2. Step 2: Convert to fraction form
    7,810.89/10,779 = 4,274.09/x
  3. Step 3: Cross multiply
    7,810.89x = 10,779 × 4,274.09
  4. Step 4: Simplify right side
    7,810.89x = 46,070,416.11
  5. Step 5: Solve for x
    x = 46,070,416.11/7,810.89
  6. Step 6: Final answer
    x = 5,898.23

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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.