Home / 13,783.17-18,992.58-13,038.78

Finding the Fourth Proportional to 13,783.17, 18,992.58 and 13,038.78

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Solution

The fourth proportional to 13,783.17, 18,992.58 and 13,038.78 is: 17,966.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,783.17 : 18,992.58 = 13,038.78 : x
  2. Step 2: Convert to fraction form
    13,783.17/18,992.58 = 13,038.78/x
  3. Step 3: Cross multiply
    13,783.17x = 18,992.58 × 13,038.78
  4. Step 4: Simplify right side
    13,783.17x = 247,640,072.25
  5. Step 5: Solve for x
    x = 247,640,072.25/13,783.17
  6. Step 6: Final answer
    x = 17,966.84

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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.