Home / 18,909.45-28,364.58-8,521.20

Finding the Fourth Proportional to 18,909.45, 28,364.58 and 8,521.20

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Solution

The fourth proportional to 18,909.45, 28,364.58 and 8,521.20 is: 12,781.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.45 : 28,364.58 = 8,521.20 : x
  2. Step 2: Convert to fraction form
    18,909.45/28,364.58 = 8,521.20/x
  3. Step 3: Cross multiply
    18,909.45x = 28,364.58 × 8,521.20
  4. Step 4: Simplify right side
    18,909.45x = 241,700,259.10
  5. Step 5: Solve for x
    x = 241,700,259.10/18,909.45
  6. Step 6: Final answer
    x = 12,781.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.