Home / 13,783.47-19,021.13-8,118.17

Finding the Fourth Proportional to 13,783.47, 19,021.13 and 8,118.17

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Solution

The fourth proportional to 13,783.47, 19,021.13 and 8,118.17 is: 11,203.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,783.47 : 19,021.13 = 8,118.17 : x
  2. Step 2: Convert to fraction form
    13,783.47/19,021.13 = 8,118.17/x
  3. Step 3: Cross multiply
    13,783.47x = 19,021.13 × 8,118.17
  4. Step 4: Simplify right side
    13,783.47x = 154,416,840.00
  5. Step 5: Solve for x
    x = 154,416,840.00/13,783.47
  6. Step 6: Final answer
    x = 11,203.05

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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.