Home / 19,215.40-28,866.30-13,383.40

Finding the Fourth Proportional to 19,215.40, 28,866.30 and 13,383.40

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Solution

The fourth proportional to 19,215.40, 28,866.30 and 13,383.40 is: 20,105.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.40 : 28,866.30 = 13,383.40 : x
  2. Step 2: Convert to fraction form
    19,215.40/28,866.30 = 13,383.40/x
  3. Step 3: Cross multiply
    19,215.40x = 28,866.30 × 13,383.40
  4. Step 4: Simplify right side
    19,215.40x = 386,329,239.42
  5. Step 5: Solve for x
    x = 386,329,239.42/19,215.40
  6. Step 6: Final answer
    x = 20,105.19

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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.