Home / 20,688.46-28,477.97-18,031.25

Finding the Fourth Proportional to 20,688.46, 28,477.97 and 18,031.25

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Solution

The fourth proportional to 20,688.46, 28,477.97 and 18,031.25 is: 24,820.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.46 : 28,477.97 = 18,031.25 : x
  2. Step 2: Convert to fraction form
    20,688.46/28,477.97 = 18,031.25/x
  3. Step 3: Cross multiply
    20,688.46x = 28,477.97 × 18,031.25
  4. Step 4: Simplify right side
    20,688.46x = 513,493,396.56
  5. Step 5: Solve for x
    x = 513,493,396.56/20,688.46
  6. Step 6: Final answer
    x = 24,820.29

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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.