Home / 20,448.86-28,219.25-12,900.06

Finding the Fourth Proportional to 20,448.86, 28,219.25 and 12,900.06

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Solution

The fourth proportional to 20,448.86, 28,219.25 and 12,900.06 is: 17,801.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.86 : 28,219.25 = 12,900.06 : x
  2. Step 2: Convert to fraction form
    20,448.86/28,219.25 = 12,900.06/x
  3. Step 3: Cross multiply
    20,448.86x = 28,219.25 × 12,900.06
  4. Step 4: Simplify right side
    20,448.86x = 364,030,050.41
  5. Step 5: Solve for x
    x = 364,030,050.41/20,448.86
  6. Step 6: Final answer
    x = 17,801.98

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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.