Home / 12,742.40-19,104.87-6,490.31

Finding the Fourth Proportional to 12,742.40, 19,104.87 and 6,490.31

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Solution

The fourth proportional to 12,742.40, 19,104.87 and 6,490.31 is: 9,731.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.40 : 19,104.87 = 6,490.31 : x
  2. Step 2: Convert to fraction form
    12,742.40/19,104.87 = 6,490.31/x
  3. Step 3: Cross multiply
    12,742.40x = 19,104.87 × 6,490.31
  4. Step 4: Simplify right side
    12,742.40x = 123,996,433.29
  5. Step 5: Solve for x
    x = 123,996,433.29/12,742.40
  6. Step 6: Final answer
    x = 9,731.01

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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.