Home / 20,637.79-28,478.59-11,683.24

Finding the Fourth Proportional to 20,637.79, 28,478.59 and 11,683.24

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Solution

The fourth proportional to 20,637.79, 28,478.59 and 11,683.24 is: 16,121.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.79 : 28,478.59 = 11,683.24 : x
  2. Step 2: Convert to fraction form
    20,637.79/28,478.59 = 11,683.24/x
  3. Step 3: Cross multiply
    20,637.79x = 28,478.59 × 11,683.24
  4. Step 4: Simplify right side
    20,637.79x = 332,722,201.83
  5. Step 5: Solve for x
    x = 332,722,201.83/20,637.79
  6. Step 6: Final answer
    x = 16,121.99

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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.