Home / 9,778.07-13,490.20-6,422.70

Finding the Fourth Proportional to 9,778.07, 13,490.20 and 6,422.70

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Solution

The fourth proportional to 9,778.07, 13,490.20 and 6,422.70 is: 8,861.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,778.07 : 13,490.20 = 6,422.70 : x
  2. Step 2: Convert to fraction form
    9,778.07/13,490.20 = 6,422.70/x
  3. Step 3: Cross multiply
    9,778.07x = 13,490.20 × 6,422.70
  4. Step 4: Simplify right side
    9,778.07x = 86,643,507.54
  5. Step 5: Solve for x
    x = 86,643,507.54/9,778.07
  6. Step 6: Final answer
    x = 8,861.00

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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.