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Finding the Fourth Proportional to 12,653, 18,955.74 and 11,698.28

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Solution

The fourth proportional to 12,653, 18,955.74 and 11,698.28 is: 17,525.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653 : 18,955.74 = 11,698.28 : x
  2. Step 2: Convert to fraction form
    12,653/18,955.74 = 11,698.28/x
  3. Step 3: Cross multiply
    12,653x = 18,955.74 × 11,698.28
  4. Step 4: Simplify right side
    12,653x = 221,749,554.13
  5. Step 5: Solve for x
    x = 221,749,554.13/12,653
  6. Step 6: Final answer
    x = 17,525.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.