Home / 12,272.64-18,417.60-7,900.80

Finding the Fourth Proportional to 12,272.64, 18,417.60 and 7,900.80

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Solution

The fourth proportional to 12,272.64, 18,417.60 and 7,900.80 is: 11,856.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,272.64 : 18,417.60 = 7,900.80 : x
  2. Step 2: Convert to fraction form
    12,272.64/18,417.60 = 7,900.80/x
  3. Step 3: Cross multiply
    12,272.64x = 18,417.60 × 7,900.80
  4. Step 4: Simplify right side
    12,272.64x = 145,513,774.08
  5. Step 5: Solve for x
    x = 145,513,774.08/12,272.64
  6. Step 6: Final answer
    x = 11,856.76

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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.