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Finding the Fourth Proportional to 13,888.51, 19,162.34 and 7,918.00

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Solution

The fourth proportional to 13,888.51, 19,162.34 and 7,918.00 is: 10,924.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.51 : 19,162.34 = 7,918.00 : x
  2. Step 2: Convert to fraction form
    13,888.51/19,162.34 = 7,918.00/x
  3. Step 3: Cross multiply
    13,888.51x = 19,162.34 × 7,918.00
  4. Step 4: Simplify right side
    13,888.51x = 151,727,380.01
  5. Step 5: Solve for x
    x = 151,727,380.01/13,888.51
  6. Step 6: Final answer
    x = 10,924.67

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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.