Home / 13,708.58-18,918.45-7,740.30

Finding the Fourth Proportional to 13,708.58, 18,918.45 and 7,740.30

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Solution

The fourth proportional to 13,708.58, 18,918.45 and 7,740.30 is: 10,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.58 : 18,918.45 = 7,740.30 : x
  2. Step 2: Convert to fraction form
    13,708.58/18,918.45 = 7,740.30/x
  3. Step 3: Cross multiply
    13,708.58x = 18,918.45 × 7,740.30
  4. Step 4: Simplify right side
    13,708.58x = 146,434,478.54
  5. Step 5: Solve for x
    x = 146,434,478.54/13,708.58
  6. Step 6: Final answer
    x = 10,681.96

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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.