Home / 20,621.81-28,458.18-12,663.97

Finding the Fourth Proportional to 20,621.81, 28,458.18 and 12,663.97

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Solution

The fourth proportional to 20,621.81, 28,458.18 and 12,663.97 is: 17,476.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.81 : 28,458.18 = 12,663.97 : x
  2. Step 2: Convert to fraction form
    20,621.81/28,458.18 = 12,663.97/x
  3. Step 3: Cross multiply
    20,621.81x = 28,458.18 × 12,663.97
  4. Step 4: Simplify right side
    20,621.81x = 360,393,466.63
  5. Step 5: Solve for x
    x = 360,393,466.63/20,621.81
  6. Step 6: Final answer
    x = 17,476.32

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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.