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Finding the Fourth Proportional to 10,486.80, 14,466.60 and 8,931.60

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Solution

The fourth proportional to 10,486.80, 14,466.60 and 8,931.60 is: 12,321.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,486.80 : 14,466.60 = 8,931.60 : x
  2. Step 2: Convert to fraction form
    10,486.80/14,466.60 = 8,931.60/x
  3. Step 3: Cross multiply
    10,486.80x = 14,466.60 × 8,931.60
  4. Step 4: Simplify right side
    10,486.80x = 129,209,884.56
  5. Step 5: Solve for x
    x = 129,209,884.56/10,486.80
  6. Step 6: Final answer
    x = 12,321.19

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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.