Home / 21,605.40-29,816.61-12,653.58

Finding the Fourth Proportional to 21,605.40, 29,816.61 and 12,653.58

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Solution

The fourth proportional to 21,605.40, 29,816.61 and 12,653.58 is: 17,462.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.40 : 29,816.61 = 12,653.58 : x
  2. Step 2: Convert to fraction form
    21,605.40/29,816.61 = 12,653.58/x
  3. Step 3: Cross multiply
    21,605.40x = 29,816.61 × 12,653.58
  4. Step 4: Simplify right side
    21,605.40x = 377,286,924.33
  5. Step 5: Solve for x
    x = 377,286,924.33/21,605.40
  6. Step 6: Final answer
    x = 17,462.62

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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.