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Finding the Fourth Proportional to 13,151.70, 18,144.63 and 7,773.01

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Solution

The fourth proportional to 13,151.70, 18,144.63 and 7,773.01 is: 10,723.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.70 : 18,144.63 = 7,773.01 : x
  2. Step 2: Convert to fraction form
    13,151.70/18,144.63 = 7,773.01/x
  3. Step 3: Cross multiply
    13,151.70x = 18,144.63 × 7,773.01
  4. Step 4: Simplify right side
    13,151.70x = 141,038,345.07
  5. Step 5: Solve for x
    x = 141,038,345.07/13,151.70
  6. Step 6: Final answer
    x = 10,723.96

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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.