Home / 13,708.83-18,917.87-7,740.35

Finding the Fourth Proportional to 13,708.83, 18,917.87 and 7,740.35

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Solution

The fourth proportional to 13,708.83, 18,917.87 and 7,740.35 is: 10,681.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.83 : 18,917.87 = 7,740.35 : x
  2. Step 2: Convert to fraction form
    13,708.83/18,917.87 = 7,740.35/x
  3. Step 3: Cross multiply
    13,708.83x = 18,917.87 × 7,740.35
  4. Step 4: Simplify right side
    13,708.83x = 146,430,935.05
  5. Step 5: Solve for x
    x = 146,430,935.05/13,708.83
  6. Step 6: Final answer
    x = 10,681.50

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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.