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Finding the Fourth Proportional to 7,810.56, 10,777.80 and 4,453.56

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Solution

The fourth proportional to 7,810.56, 10,777.80 and 4,453.56 is: 6,145.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810.56 : 10,777.80 = 4,453.56 : x
  2. Step 2: Convert to fraction form
    7,810.56/10,777.80 = 4,453.56/x
  3. Step 3: Cross multiply
    7,810.56x = 10,777.80 × 4,453.56
  4. Step 4: Simplify right side
    7,810.56x = 47,999,578.97
  5. Step 5: Solve for x
    x = 47,999,578.97/7,810.56
  6. Step 6: Final answer
    x = 6,145.47

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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.