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Finding the Fourth Proportional to 8,400.99, 12,602.65 and 3,720.63

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Solution

The fourth proportional to 8,400.99, 12,602.65 and 3,720.63 is: 5,581.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,400.99 : 12,602.65 = 3,720.63 : x
  2. Step 2: Convert to fraction form
    8,400.99/12,602.65 = 3,720.63/x
  3. Step 3: Cross multiply
    8,400.99x = 12,602.65 × 3,720.63
  4. Step 4: Simplify right side
    8,400.99x = 46,889,797.67
  5. Step 5: Solve for x
    x = 46,889,797.67/8,400.99
  6. Step 6: Final answer
    x = 5,581.46

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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.