Home / 20,589.03-28,402.43-13,783.32

Finding the Fourth Proportional to 20,589.03, 28,402.43 and 13,783.32

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Solution

The fourth proportional to 20,589.03, 28,402.43 and 13,783.32 is: 19,013.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.03 : 28,402.43 = 13,783.32 : x
  2. Step 2: Convert to fraction form
    20,589.03/28,402.43 = 13,783.32/x
  3. Step 3: Cross multiply
    20,589.03x = 28,402.43 × 13,783.32
  4. Step 4: Simplify right side
    20,589.03x = 391,479,712.55
  5. Step 5: Solve for x
    x = 391,479,712.55/20,589.03
  6. Step 6: Final answer
    x = 19,013.99

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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.