Home / 8,970.08-12,378.77-4,991.09

Finding the Fourth Proportional to 8,970.08, 12,378.77 and 4,991.09

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Solution

The fourth proportional to 8,970.08, 12,378.77 and 4,991.09 is: 6,887.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.08 : 12,378.77 = 4,991.09 : x
  2. Step 2: Convert to fraction form
    8,970.08/12,378.77 = 4,991.09/x
  3. Step 3: Cross multiply
    8,970.08x = 12,378.77 × 4,991.09
  4. Step 4: Simplify right side
    8,970.08x = 61,783,555.16
  5. Step 5: Solve for x
    x = 61,783,555.16/8,970.08
  6. Step 6: Final answer
    x = 6,887.74

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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.