Home / 20,762.87-28,642.80-13,589.63

Finding the Fourth Proportional to 20,762.87, 28,642.80 and 13,589.63

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Solution

The fourth proportional to 20,762.87, 28,642.80 and 13,589.63 is: 18,747.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.87 : 28,642.80 = 13,589.63 : x
  2. Step 2: Convert to fraction form
    20,762.87/28,642.80 = 13,589.63/x
  3. Step 3: Cross multiply
    20,762.87x = 28,642.80 × 13,589.63
  4. Step 4: Simplify right side
    20,762.87x = 389,245,116.24
  5. Step 5: Solve for x
    x = 389,245,116.24/20,762.87
  6. Step 6: Final answer
    x = 18,747.17

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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.