Home / 15,811.80-23,688.90-12,874.20

Finding the Fourth Proportional to 15,811.80, 23,688.90 and 12,874.20

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Solution

The fourth proportional to 15,811.80, 23,688.90 and 12,874.20 is: 19,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.80 : 23,688.90 = 12,874.20 : x
  2. Step 2: Convert to fraction form
    15,811.80/23,688.90 = 12,874.20/x
  3. Step 3: Cross multiply
    15,811.80x = 23,688.90 × 12,874.20
  4. Step 4: Simplify right side
    15,811.80x = 304,975,636.38
  5. Step 5: Solve for x
    x = 304,975,636.38/15,811.80
  6. Step 6: Final answer
    x = 19,287.85

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1.5x scale

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.