Home / 28,176.64-42,287.04-12,392.64

Finding the Fourth Proportional to 28,176.64, 42,287.04 and 12,392.64

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Solution

The fourth proportional to 28,176.64, 42,287.04 and 12,392.64 is: 18,598.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,176.64 : 42,287.04 = 12,392.64 : x
  2. Step 2: Convert to fraction form
    28,176.64/42,287.04 = 12,392.64/x
  3. Step 3: Cross multiply
    28,176.64x = 42,287.04 × 12,392.64
  4. Step 4: Simplify right side
    28,176.64x = 524,048,063.39
  5. Step 5: Solve for x
    x = 524,048,063.39/28,176.64
  6. Step 6: Final answer
    x = 18,598.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.