Home / 7,890.52-11,821.20-3,985.60

Finding the Fourth Proportional to 7,890.52, 11,821.20 and 3,985.60

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Solution

The fourth proportional to 7,890.52, 11,821.20 and 3,985.60 is: 5,971.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.52 : 11,821.20 = 3,985.60 : x
  2. Step 2: Convert to fraction form
    7,890.52/11,821.20 = 3,985.60/x
  3. Step 3: Cross multiply
    7,890.52x = 11,821.20 × 3,985.60
  4. Step 4: Simplify right side
    7,890.52x = 47,114,574.72
  5. Step 5: Solve for x
    x = 47,114,574.72/7,890.52
  6. Step 6: Final answer
    x = 5,971.04

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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.