Home / 9,145.63-12,619.95-5,165.90

Finding the Fourth Proportional to 9,145.63, 12,619.95 and 5,165.90

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Solution

The fourth proportional to 9,145.63, 12,619.95 and 5,165.90 is: 7,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,145.63 : 12,619.95 = 5,165.90 : x
  2. Step 2: Convert to fraction form
    9,145.63/12,619.95 = 5,165.90/x
  3. Step 3: Cross multiply
    9,145.63x = 12,619.95 × 5,165.90
  4. Step 4: Simplify right side
    9,145.63x = 65,193,336.61
  5. Step 5: Solve for x
    x = 65,193,336.61/9,145.63
  6. Step 6: Final answer
    x = 7,128.36

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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.