Home / 13,999.40-21,020.70-8,167.40

Finding the Fourth Proportional to 13,999.40, 21,020.70 and 8,167.40

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Solution

The fourth proportional to 13,999.40, 21,020.70 and 8,167.40 is: 12,263.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.40 : 21,020.70 = 8,167.40 : x
  2. Step 2: Convert to fraction form
    13,999.40/21,020.70 = 8,167.40/x
  3. Step 3: Cross multiply
    13,999.40x = 21,020.70 × 8,167.40
  4. Step 4: Simplify right side
    13,999.40x = 171,684,465.18
  5. Step 5: Solve for x
    x = 171,684,465.18/13,999.40
  6. Step 6: Final answer
    x = 12,263.70

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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.