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Finding the Fourth Proportional to 8,645.87, 12,970.70 and 2,803.07

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Solution

The fourth proportional to 8,645.87, 12,970.70 and 2,803.07 is: 4,205.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.87 : 12,970.70 = 2,803.07 : x
  2. Step 2: Convert to fraction form
    8,645.87/12,970.70 = 2,803.07/x
  3. Step 3: Cross multiply
    8,645.87x = 12,970.70 × 2,803.07
  4. Step 4: Simplify right side
    8,645.87x = 36,357,780.05
  5. Step 5: Solve for x
    x = 36,357,780.05/8,645.87
  6. Step 6: Final answer
    x = 4,205.22

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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.