Home / 21,020.81-29,009.04-11,460.71

Finding the Fourth Proportional to 21,020.81, 29,009.04 and 11,460.71

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Solution

The fourth proportional to 21,020.81, 29,009.04 and 11,460.71 is: 15,815.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.81 : 29,009.04 = 11,460.71 : x
  2. Step 2: Convert to fraction form
    21,020.81/29,009.04 = 11,460.71/x
  3. Step 3: Cross multiply
    21,020.81x = 29,009.04 × 11,460.71
  4. Step 4: Simplify right side
    21,020.81x = 332,464,049.77
  5. Step 5: Solve for x
    x = 332,464,049.77/21,020.81
  6. Step 6: Final answer
    x = 15,815.95

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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.