Home / 21,002.15-28,982.71-11,570.51

Finding the Fourth Proportional to 21,002.15, 28,982.71 and 11,570.51

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Solution

The fourth proportional to 21,002.15, 28,982.71 and 11,570.51 is: 15,967.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.15 : 28,982.71 = 11,570.51 : x
  2. Step 2: Convert to fraction form
    21,002.15/28,982.71 = 11,570.51/x
  3. Step 3: Cross multiply
    21,002.15x = 28,982.71 × 11,570.51
  4. Step 4: Simplify right side
    21,002.15x = 335,344,735.88
  5. Step 5: Solve for x
    x = 335,344,735.88/21,002.15
  6. Step 6: Final answer
    x = 15,967.16

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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.