Home / 20,632.91-28,445.20-14,172.35

Finding the Fourth Proportional to 20,632.91, 28,445.20 and 14,172.35

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Solution

The fourth proportional to 20,632.91, 28,445.20 and 14,172.35 is: 19,538.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.91 : 28,445.20 = 14,172.35 : x
  2. Step 2: Convert to fraction form
    20,632.91/28,445.20 = 14,172.35/x
  3. Step 3: Cross multiply
    20,632.91x = 28,445.20 × 14,172.35
  4. Step 4: Simplify right side
    20,632.91x = 403,135,152.56
  5. Step 5: Solve for x
    x = 403,135,152.56/20,632.91
  6. Step 6: Final answer
    x = 19,538.46

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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.