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Finding the Fourth Proportional to 8,970.37, 12,379.11 and 4,991.74

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Solution

The fourth proportional to 8,970.37, 12,379.11 and 4,991.74 is: 6,888.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.37 : 12,379.11 = 4,991.74 : x
  2. Step 2: Convert to fraction form
    8,970.37/12,379.11 = 4,991.74/x
  3. Step 3: Cross multiply
    8,970.37x = 12,379.11 × 4,991.74
  4. Step 4: Simplify right side
    8,970.37x = 61,793,224.18
  5. Step 5: Solve for x
    x = 61,793,224.18/8,970.37
  6. Step 6: Final answer
    x = 6,888.59

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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.