Home / 13,747.86-18,971.01-7,778.16

Finding the Fourth Proportional to 13,747.86, 18,971.01 and 7,778.16

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Solution

The fourth proportional to 13,747.86, 18,971.01 and 7,778.16 is: 10,733.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.86 : 18,971.01 = 7,778.16 : x
  2. Step 2: Convert to fraction form
    13,747.86/18,971.01 = 7,778.16/x
  3. Step 3: Cross multiply
    13,747.86x = 18,971.01 × 7,778.16
  4. Step 4: Simplify right side
    13,747.86x = 147,559,551.14
  5. Step 5: Solve for x
    x = 147,559,551.14/13,747.86
  6. Step 6: Final answer
    x = 10,733.27

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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.