Home / 21,002.05-28,982.50-11,570.95

Finding the Fourth Proportional to 21,002.05, 28,982.50 and 11,570.95

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Solution

The fourth proportional to 21,002.05, 28,982.50 and 11,570.95 is: 15,967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.05 : 28,982.50 = 11,570.95 : x
  2. Step 2: Convert to fraction form
    21,002.05/28,982.50 = 11,570.95/x
  3. Step 3: Cross multiply
    21,002.05x = 28,982.50 × 11,570.95
  4. Step 4: Simplify right side
    21,002.05x = 335,355,058.38
  5. Step 5: Solve for x
    x = 335,355,058.38/21,002.05
  6. Step 6: Final answer
    x = 15,967.73

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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.