Home / 28,991.76-43,487.60-8,215.28

Finding the Fourth Proportional to 28,991.76, 43,487.60 and 8,215.28

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Solution

The fourth proportional to 28,991.76, 43,487.60 and 8,215.28 is: 12,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.76 : 43,487.60 = 8,215.28 : x
  2. Step 2: Convert to fraction form
    28,991.76/43,487.60 = 8,215.28/x
  3. Step 3: Cross multiply
    28,991.76x = 43,487.60 × 8,215.28
  4. Step 4: Simplify right side
    28,991.76x = 357,262,810.53
  5. Step 5: Solve for x
    x = 357,262,810.53/28,991.76
  6. Step 6: Final answer
    x = 12,322.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.