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Finding the Fourth Proportional to 12,873.99, 19,305.89 and 8,715.20

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Solution

The fourth proportional to 12,873.99, 19,305.89 and 8,715.20 is: 13,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,873.99 : 19,305.89 = 8,715.20 : x
  2. Step 2: Convert to fraction form
    12,873.99/19,305.89 = 8,715.20/x
  3. Step 3: Cross multiply
    12,873.99x = 19,305.89 × 8,715.20
  4. Step 4: Simplify right side
    12,873.99x = 168,254,634.13
  5. Step 5: Solve for x
    x = 168,254,634.13/12,873.99
  6. Step 6: Final answer
    x = 13,069.35

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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.