Home / 20,642.70-28,498.75-13,589.63

Finding the Fourth Proportional to 20,642.70, 28,498.75 and 13,589.63

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Solution

The fourth proportional to 20,642.70, 28,498.75 and 13,589.63 is: 18,761.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.70 : 28,498.75 = 13,589.63 : x
  2. Step 2: Convert to fraction form
    20,642.70/28,498.75 = 13,589.63/x
  3. Step 3: Cross multiply
    20,642.70x = 28,498.75 × 13,589.63
  4. Step 4: Simplify right side
    20,642.70x = 387,287,291.49
  5. Step 5: Solve for x
    x = 387,287,291.49/20,642.70
  6. Step 6: Final answer
    x = 18,761.46

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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.