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Finding the Fourth Proportional to 8,765.21, 13,085.36 and 8,457.65

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Solution

The fourth proportional to 8,765.21, 13,085.36 and 8,457.65 is: 12,626.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.21 : 13,085.36 = 8,457.65 : x
  2. Step 2: Convert to fraction form
    8,765.21/13,085.36 = 8,457.65/x
  3. Step 3: Cross multiply
    8,765.21x = 13,085.36 × 8,457.65
  4. Step 4: Simplify right side
    8,765.21x = 110,671,350.72
  5. Step 5: Solve for x
    x = 110,671,350.72/8,765.21
  6. Step 6: Final answer
    x = 12,626.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.