Home / 12,765.81-17,618.45-7,730.04

Finding the Fourth Proportional to 12,765.81, 17,618.45 and 7,730.04

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Solution

The fourth proportional to 12,765.81, 17,618.45 and 7,730.04 is: 10,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,765.81 : 17,618.45 = 7,730.04 : x
  2. Step 2: Convert to fraction form
    12,765.81/17,618.45 = 7,730.04/x
  3. Step 3: Cross multiply
    12,765.81x = 17,618.45 × 7,730.04
  4. Step 4: Simplify right side
    12,765.81x = 136,191,323.24
  5. Step 5: Solve for x
    x = 136,191,323.24/12,765.81
  6. Step 6: Final answer
    x = 10,668.44

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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.