Home / 12,789.49-19,182.90-3,430.51

Finding the Fourth Proportional to 12,789.49, 19,182.90 and 3,430.51

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Solution

The fourth proportional to 12,789.49, 19,182.90 and 3,430.51 is: 5,145.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.49 : 19,182.90 = 3,430.51 : x
  2. Step 2: Convert to fraction form
    12,789.49/19,182.90 = 3,430.51/x
  3. Step 3: Cross multiply
    12,789.49x = 19,182.90 × 3,430.51
  4. Step 4: Simplify right side
    12,789.49x = 65,807,069.46
  5. Step 5: Solve for x
    x = 65,807,069.46/12,789.49
  6. Step 6: Final answer
    x = 5,145.40

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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.