Home / 20,971.27-28,946.52-12,479.41

Finding the Fourth Proportional to 20,971.27, 28,946.52 and 12,479.41

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Solution

The fourth proportional to 20,971.27, 28,946.52 and 12,479.41 is: 17,225.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.27 : 28,946.52 = 12,479.41 : x
  2. Step 2: Convert to fraction form
    20,971.27/28,946.52 = 12,479.41/x
  3. Step 3: Cross multiply
    20,971.27x = 28,946.52 × 12,479.41
  4. Step 4: Simplify right side
    20,971.27x = 361,235,491.15
  5. Step 5: Solve for x
    x = 361,235,491.15/20,971.27
  6. Step 6: Final answer
    x = 17,225.26

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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.