Home / 20,508.65-28,302.07-12,015.80

Finding the Fourth Proportional to 20,508.65, 28,302.07 and 12,015.80

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Solution

The fourth proportional to 20,508.65, 28,302.07 and 12,015.80 is: 16,581.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.65 : 28,302.07 = 12,015.80 : x
  2. Step 2: Convert to fraction form
    20,508.65/28,302.07 = 12,015.80/x
  3. Step 3: Cross multiply
    20,508.65x = 28,302.07 × 12,015.80
  4. Step 4: Simplify right side
    20,508.65x = 340,072,012.71
  5. Step 5: Solve for x
    x = 340,072,012.71/20,508.65
  6. Step 6: Final answer
    x = 16,581.88

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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.