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Finding the Fourth Proportional to 7,970.15, 10,999.98 and 5,739.41

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Solution

The fourth proportional to 7,970.15, 10,999.98 and 5,739.41 is: 7,921.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,970.15 : 10,999.98 = 5,739.41 : x
  2. Step 2: Convert to fraction form
    7,970.15/10,999.98 = 5,739.41/x
  3. Step 3: Cross multiply
    7,970.15x = 10,999.98 × 5,739.41
  4. Step 4: Simplify right side
    7,970.15x = 63,133,340.21
  5. Step 5: Solve for x
    x = 63,133,340.21/7,970.15
  6. Step 6: Final answer
    x = 7,921.23

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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.