Home / 28,155.20-38,853.68-16,218.50

Finding the Fourth Proportional to 28,155.20, 38,853.68 and 16,218.50

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Solution

The fourth proportional to 28,155.20, 38,853.68 and 16,218.50 is: 22,381.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.20 : 38,853.68 = 16,218.50 : x
  2. Step 2: Convert to fraction form
    28,155.20/38,853.68 = 16,218.50/x
  3. Step 3: Cross multiply
    28,155.20x = 38,853.68 × 16,218.50
  4. Step 4: Simplify right side
    28,155.20x = 630,148,409.08
  5. Step 5: Solve for x
    x = 630,148,409.08/28,155.20
  6. Step 6: Final answer
    x = 22,381.24

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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.