Home / 13,555.80-20,306.88-10,620.36

Finding the Fourth Proportional to 13,555.80, 20,306.88 and 10,620.36

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Solution

The fourth proportional to 13,555.80, 20,306.88 and 10,620.36 is: 15,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.80 : 20,306.88 = 10,620.36 : x
  2. Step 2: Convert to fraction form
    13,555.80/20,306.88 = 10,620.36/x
  3. Step 3: Cross multiply
    13,555.80x = 20,306.88 × 10,620.36
  4. Step 4: Simplify right side
    13,555.80x = 215,666,376.08
  5. Step 5: Solve for x
    x = 215,666,376.08/13,555.80
  6. Step 6: Final answer
    x = 15,909.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.