Home / 20,445.80-28,231.08-16,485.80

Finding the Fourth Proportional to 20,445.80, 28,231.08 and 16,485.80

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Solution

The fourth proportional to 20,445.80, 28,231.08 and 16,485.80 is: 22,763.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.80 : 28,231.08 = 16,485.80 : x
  2. Step 2: Convert to fraction form
    20,445.80/28,231.08 = 16,485.80/x
  3. Step 3: Cross multiply
    20,445.80x = 28,231.08 × 16,485.80
  4. Step 4: Simplify right side
    20,445.80x = 465,411,938.66
  5. Step 5: Solve for x
    x = 465,411,938.66/20,445.80
  6. Step 6: Final answer
    x = 22,763.21

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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.