Home / 15,438.82-21,289.95-13,731.93

Finding the Fourth Proportional to 15,438.82, 21,289.95 and 13,731.93

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Solution

The fourth proportional to 15,438.82, 21,289.95 and 13,731.93 is: 18,936.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.82 : 21,289.95 = 13,731.93 : x
  2. Step 2: Convert to fraction form
    15,438.82/21,289.95 = 13,731.93/x
  3. Step 3: Cross multiply
    15,438.82x = 21,289.95 × 13,731.93
  4. Step 4: Simplify right side
    15,438.82x = 292,352,103.10
  5. Step 5: Solve for x
    x = 292,352,103.10/15,438.82
  6. Step 6: Final answer
    x = 18,936.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.