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Finding the Fourth Proportional to 12,365.75, 18,550.95 and 4,970.80

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Solution

The fourth proportional to 12,365.75, 18,550.95 and 4,970.80 is: 7,457.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,365.75 : 18,550.95 = 4,970.80 : x
  2. Step 2: Convert to fraction form
    12,365.75/18,550.95 = 4,970.80/x
  3. Step 3: Cross multiply
    12,365.75x = 18,550.95 × 4,970.80
  4. Step 4: Simplify right side
    12,365.75x = 92,213,062.26
  5. Step 5: Solve for x
    x = 92,213,062.26/12,365.75
  6. Step 6: Final answer
    x = 7,457.13

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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.