Home / 7,857.20-11,777.40-4,343.36

Finding the Fourth Proportional to 7,857.20, 11,777.40 and 4,343.36

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Solution

The fourth proportional to 7,857.20, 11,777.40 and 4,343.36 is: 6,510.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.20 : 11,777.40 = 4,343.36 : x
  2. Step 2: Convert to fraction form
    7,857.20/11,777.40 = 4,343.36/x
  3. Step 3: Cross multiply
    7,857.20x = 11,777.40 × 4,343.36
  4. Step 4: Simplify right side
    7,857.20x = 51,153,488.06
  5. Step 5: Solve for x
    x = 51,153,488.06/7,857.20
  6. Step 6: Final answer
    x = 6,510.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.