Home / 12,857.40-19,288.08-5,461.88

Finding the Fourth Proportional to 12,857.40, 19,288.08 and 5,461.88

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Solution

The fourth proportional to 12,857.40, 19,288.08 and 5,461.88 is: 8,193.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.40 : 19,288.08 = 5,461.88 : x
  2. Step 2: Convert to fraction form
    12,857.40/19,288.08 = 5,461.88/x
  3. Step 3: Cross multiply
    12,857.40x = 19,288.08 × 5,461.88
  4. Step 4: Simplify right side
    12,857.40x = 105,349,081.95
  5. Step 5: Solve for x
    x = 105,349,081.95/12,857.40
  6. Step 6: Final answer
    x = 8,193.65

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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.