Home / 21,005.28-28,987.26-11,574

Finding the Fourth Proportional to 21,005.28, 28,987.26 and 11,574

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Solution

The fourth proportional to 21,005.28, 28,987.26 and 11,574 is: 15,972.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.28 : 28,987.26 = 11,574 : x
  2. Step 2: Convert to fraction form
    21,005.28/28,987.26 = 11,574/x
  3. Step 3: Cross multiply
    21,005.28x = 28,987.26 × 11,574
  4. Step 4: Simplify right side
    21,005.28x = 335,498,547.24
  5. Step 5: Solve for x
    x = 335,498,547.24/21,005.28
  6. Step 6: Final answer
    x = 15,972.11

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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.