Home / 20,378.12-28,122.01-11,303.69

Finding the Fourth Proportional to 20,378.12, 28,122.01 and 11,303.69

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Solution

The fourth proportional to 20,378.12, 28,122.01 and 11,303.69 is: 15,599.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.12 : 28,122.01 = 11,303.69 : x
  2. Step 2: Convert to fraction form
    20,378.12/28,122.01 = 11,303.69/x
  3. Step 3: Cross multiply
    20,378.12x = 28,122.01 × 11,303.69
  4. Step 4: Simplify right side
    20,378.12x = 317,882,525.26
  5. Step 5: Solve for x
    x = 317,882,525.26/20,378.12
  6. Step 6: Final answer
    x = 15,599.21

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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.