Home / 20,388.99-28,137.29-11,437.16

Finding the Fourth Proportional to 20,388.99, 28,137.29 and 11,437.16

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Solution

The fourth proportional to 20,388.99, 28,137.29 and 11,437.16 is: 15,783.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.99 : 28,137.29 = 11,437.16 : x
  2. Step 2: Convert to fraction form
    20,388.99/28,137.29 = 11,437.16/x
  3. Step 3: Cross multiply
    20,388.99x = 28,137.29 × 11,437.16
  4. Step 4: Simplify right side
    20,388.99x = 321,810,598.07
  5. Step 5: Solve for x
    x = 321,810,598.07/20,388.99
  6. Step 6: Final answer
    x = 15,783.55

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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.