Home / 12,856.08-19,296.20-6,620.40

Finding the Fourth Proportional to 12,856.08, 19,296.20 and 6,620.40

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Solution

The fourth proportional to 12,856.08, 19,296.20 and 6,620.40 is: 9,936.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,856.08 : 19,296.20 = 6,620.40 : x
  2. Step 2: Convert to fraction form
    12,856.08/19,296.20 = 6,620.40/x
  3. Step 3: Cross multiply
    12,856.08x = 19,296.20 × 6,620.40
  4. Step 4: Simplify right side
    12,856.08x = 127,748,562.48
  5. Step 5: Solve for x
    x = 127,748,562.48/12,856.08
  6. Step 6: Final answer
    x = 9,936.82

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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.