Home / 20,491.74-28,261.04-12,423.47

Finding the Fourth Proportional to 20,491.74, 28,261.04 and 12,423.47

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Solution

The fourth proportional to 20,491.74, 28,261.04 and 12,423.47 is: 17,133.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.74 : 28,261.04 = 12,423.47 : x
  2. Step 2: Convert to fraction form
    20,491.74/28,261.04 = 12,423.47/x
  3. Step 3: Cross multiply
    20,491.74x = 28,261.04 × 12,423.47
  4. Step 4: Simplify right side
    20,491.74x = 351,099,979.19
  5. Step 5: Solve for x
    x = 351,099,979.19/20,491.74
  6. Step 6: Final answer
    x = 17,133.73

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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.