Home / 28,113.20-42,164.40-8,392.40

Finding the Fourth Proportional to 28,113.20, 42,164.40 and 8,392.40

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Solution

The fourth proportional to 28,113.20, 42,164.40 and 8,392.40 is: 12,586.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.20 : 42,164.40 = 8,392.40 : x
  2. Step 2: Convert to fraction form
    28,113.20/42,164.40 = 8,392.40/x
  3. Step 3: Cross multiply
    28,113.20x = 42,164.40 × 8,392.40
  4. Step 4: Simplify right side
    28,113.20x = 353,860,510.56
  5. Step 5: Solve for x
    x = 353,860,510.56/28,113.20
  6. Step 6: Final answer
    x = 12,586.99

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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.