Home / 20,297.78-28,014.62-12,750.81

Finding the Fourth Proportional to 20,297.78, 28,014.62 and 12,750.81

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Solution

The fourth proportional to 20,297.78, 28,014.62 and 12,750.81 is: 17,598.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.78 : 28,014.62 = 12,750.81 : x
  2. Step 2: Convert to fraction form
    20,297.78/28,014.62 = 12,750.81/x
  3. Step 3: Cross multiply
    20,297.78x = 28,014.62 × 12,750.81
  4. Step 4: Simplify right side
    20,297.78x = 357,209,096.84
  5. Step 5: Solve for x
    x = 357,209,096.84/20,297.78
  6. Step 6: Final answer
    x = 17,598.43

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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.