Home / 20,384.14-28,118.16-12,818.47

Finding the Fourth Proportional to 20,384.14, 28,118.16 and 12,818.47

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Solution

The fourth proportional to 20,384.14, 28,118.16 and 12,818.47 is: 17,681.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.14 : 28,118.16 = 12,818.47 : x
  2. Step 2: Convert to fraction form
    20,384.14/28,118.16 = 12,818.47/x
  3. Step 3: Cross multiply
    20,384.14x = 28,118.16 × 12,818.47
  4. Step 4: Simplify right side
    20,384.14x = 360,431,585.73
  5. Step 5: Solve for x
    x = 360,431,585.73/20,384.14
  6. Step 6: Final answer
    x = 17,681.97

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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.