Home / 7,815.40-10,786.79-4,457.89

Finding the Fourth Proportional to 7,815.40, 10,786.79 and 4,457.89

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Solution

The fourth proportional to 7,815.40, 10,786.79 and 4,457.89 is: 6,152.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.40 : 10,786.79 = 4,457.89 : x
  2. Step 2: Convert to fraction form
    7,815.40/10,786.79 = 4,457.89/x
  3. Step 3: Cross multiply
    7,815.40x = 10,786.79 × 4,457.89
  4. Step 4: Simplify right side
    7,815.40x = 48,086,274.02
  5. Step 5: Solve for x
    x = 48,086,274.02/7,815.40
  6. Step 6: Final answer
    x = 6,152.76

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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.