Home / 13,698.80-18,904.92-7,730.72

Finding the Fourth Proportional to 13,698.80, 18,904.92 and 7,730.72

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Solution

The fourth proportional to 13,698.80, 18,904.92 and 7,730.72 is: 10,668.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.80 : 18,904.92 = 7,730.72 : x
  2. Step 2: Convert to fraction form
    13,698.80/18,904.92 = 7,730.72/x
  3. Step 3: Cross multiply
    13,698.80x = 18,904.92 × 7,730.72
  4. Step 4: Simplify right side
    13,698.80x = 146,148,643.14
  5. Step 5: Solve for x
    x = 146,148,643.14/13,698.80
  6. Step 6: Final answer
    x = 10,668.72

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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.