Home / 13,667.93-18,862.13-13,172.21

Finding the Fourth Proportional to 13,667.93, 18,862.13 and 13,172.21

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Solution

The fourth proportional to 13,667.93, 18,862.13 and 13,172.21 is: 18,178.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.93 : 18,862.13 = 13,172.21 : x
  2. Step 2: Convert to fraction form
    13,667.93/18,862.13 = 13,172.21/x
  3. Step 3: Cross multiply
    13,667.93x = 18,862.13 × 13,172.21
  4. Step 4: Simplify right side
    13,667.93x = 248,455,937.41
  5. Step 5: Solve for x
    x = 248,455,937.41/13,667.93
  6. Step 6: Final answer
    x = 18,178.02

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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.