Home / 21,002.56-28,983.36-11,570.80

Finding the Fourth Proportional to 21,002.56, 28,983.36 and 11,570.80

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Solution

The fourth proportional to 21,002.56, 28,983.36 and 11,570.80 is: 15,967.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.56 : 28,983.36 = 11,570.80 : x
  2. Step 2: Convert to fraction form
    21,002.56/28,983.36 = 11,570.80/x
  3. Step 3: Cross multiply
    21,002.56x = 28,983.36 × 11,570.80
  4. Step 4: Simplify right side
    21,002.56x = 335,360,661.89
  5. Step 5: Solve for x
    x = 335,360,661.89/21,002.56
  6. Step 6: Final answer
    x = 15,967.61

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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.