Home / 21,004.81-28,987.95-11,573.38

Finding the Fourth Proportional to 21,004.81, 28,987.95 and 11,573.38

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Solution

The fourth proportional to 21,004.81, 28,987.95 and 11,573.38 is: 15,971.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.81 : 28,987.95 = 11,573.38 : x
  2. Step 2: Convert to fraction form
    21,004.81/28,987.95 = 11,573.38/x
  3. Step 3: Cross multiply
    21,004.81x = 28,987.95 × 11,573.38
  4. Step 4: Simplify right side
    21,004.81x = 335,488,560.77
  5. Step 5: Solve for x
    x = 335,488,560.77/21,004.81
  6. Step 6: Final answer
    x = 15,971.99

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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.