Home / 6,390.40-8,825.52-4,991.08

Finding the Fourth Proportional to 6,390.40, 8,825.52 and 4,991.08

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Solution

The fourth proportional to 6,390.40, 8,825.52 and 4,991.08 is: 6,892.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.40 : 8,825.52 = 4,991.08 : x
  2. Step 2: Convert to fraction form
    6,390.40/8,825.52 = 4,991.08/x
  3. Step 3: Cross multiply
    6,390.40x = 8,825.52 × 4,991.08
  4. Step 4: Simplify right side
    6,390.40x = 44,048,876.36
  5. Step 5: Solve for x
    x = 44,048,876.36/6,390.40
  6. Step 6: Final answer
    x = 6,892.98

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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.