Home / 7,890.90-11,840.87-3,210.04

Finding the Fourth Proportional to 7,890.90, 11,840.87 and 3,210.04

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Solution

The fourth proportional to 7,890.90, 11,840.87 and 3,210.04 is: 4,816.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.90 : 11,840.87 = 3,210.04 : x
  2. Step 2: Convert to fraction form
    7,890.90/11,840.87 = 3,210.04/x
  3. Step 3: Cross multiply
    7,890.90x = 11,840.87 × 3,210.04
  4. Step 4: Simplify right side
    7,890.90x = 38,009,650.28
  5. Step 5: Solve for x
    x = 38,009,650.28/7,890.90
  6. Step 6: Final answer
    x = 4,816.90

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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.