Home / 28,157.79-38,853.43-16,218.80

Finding the Fourth Proportional to 28,157.79, 38,853.43 and 16,218.80

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Solution

The fourth proportional to 28,157.79, 38,853.43 and 16,218.80 is: 22,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.79 : 38,853.43 = 16,218.80 : x
  2. Step 2: Convert to fraction form
    28,157.79/38,853.43 = 16,218.80/x
  3. Step 3: Cross multiply
    28,157.79x = 38,853.43 × 16,218.80
  4. Step 4: Simplify right side
    28,157.79x = 630,156,010.48
  5. Step 5: Solve for x
    x = 630,156,010.48/28,157.79
  6. Step 6: Final answer
    x = 22,379.46

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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.