Home / 21,005.51-28,987.73-11,574.08

Finding the Fourth Proportional to 21,005.51, 28,987.73 and 11,574.08

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Solution

The fourth proportional to 21,005.51, 28,987.73 and 11,574.08 is: 15,972.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.51 : 28,987.73 = 11,574.08 : x
  2. Step 2: Convert to fraction form
    21,005.51/28,987.73 = 11,574.08/x
  3. Step 3: Cross multiply
    21,005.51x = 28,987.73 × 11,574.08
  4. Step 4: Simplify right side
    21,005.51x = 335,506,103.23
  5. Step 5: Solve for x
    x = 335,506,103.23/21,005.51
  6. Step 6: Final answer
    x = 15,972.29

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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.