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Finding the Fourth Proportional to 13,670.61, 18,866.55 and 7,701.93

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Solution

The fourth proportional to 13,670.61, 18,866.55 and 7,701.93 is: 10,629.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.61 : 18,866.55 = 7,701.93 : x
  2. Step 2: Convert to fraction form
    13,670.61/18,866.55 = 7,701.93/x
  3. Step 3: Cross multiply
    13,670.61x = 18,866.55 × 7,701.93
  4. Step 4: Simplify right side
    13,670.61x = 145,308,847.44
  5. Step 5: Solve for x
    x = 145,308,847.44/13,670.61
  6. Step 6: Final answer
    x = 10,629.29

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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.