Home / 13,740.18-18,958.29-7,770.56

Finding the Fourth Proportional to 13,740.18, 18,958.29 and 7,770.56

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Solution

The fourth proportional to 13,740.18, 18,958.29 and 7,770.56 is: 10,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.18 : 18,958.29 = 7,770.56 : x
  2. Step 2: Convert to fraction form
    13,740.18/18,958.29 = 7,770.56/x
  3. Step 3: Cross multiply
    13,740.18x = 18,958.29 × 7,770.56
  4. Step 4: Simplify right side
    13,740.18x = 147,316,435.15
  5. Step 5: Solve for x
    x = 147,316,435.15/13,740.18
  6. Step 6: Final answer
    x = 10,721.58

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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.