Home / 20,607.45-28,438.13-11,532.81

Finding the Fourth Proportional to 20,607.45, 28,438.13 and 11,532.81

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Solution

The fourth proportional to 20,607.45, 28,438.13 and 11,532.81 is: 15,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.45 : 28,438.13 = 11,532.81 : x
  2. Step 2: Convert to fraction form
    20,607.45/28,438.13 = 11,532.81/x
  3. Step 3: Cross multiply
    20,607.45x = 28,438.13 × 11,532.81
  4. Step 4: Simplify right side
    20,607.45x = 327,971,620.65
  5. Step 5: Solve for x
    x = 327,971,620.65/20,607.45
  6. Step 6: Final answer
    x = 15,915.20

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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.