Home / 6,666.87-10,000.81-1,986.79

Finding the Fourth Proportional to 6,666.87, 10,000.81 and 1,986.79

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Solution

The fourth proportional to 6,666.87, 10,000.81 and 1,986.79 is: 2,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.87 : 10,000.81 = 1,986.79 : x
  2. Step 2: Convert to fraction form
    6,666.87/10,000.81 = 1,986.79/x
  3. Step 3: Cross multiply
    6,666.87x = 10,000.81 × 1,986.79
  4. Step 4: Simplify right side
    6,666.87x = 19,869,509.30
  5. Step 5: Solve for x
    x = 19,869,509.30/6,666.87
  6. Step 6: Final answer
    x = 2,980.34

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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.