Home / 13,740.09-18,961.80-8,433.90

Finding the Fourth Proportional to 13,740.09, 18,961.80 and 8,433.90

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Solution

The fourth proportional to 13,740.09, 18,961.80 and 8,433.90 is: 11,639.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.09 : 18,961.80 = 8,433.90 : x
  2. Step 2: Convert to fraction form
    13,740.09/18,961.80 = 8,433.90/x
  3. Step 3: Cross multiply
    13,740.09x = 18,961.80 × 8,433.90
  4. Step 4: Simplify right side
    13,740.09x = 159,921,925.02
  5. Step 5: Solve for x
    x = 159,921,925.02/13,740.09
  6. Step 6: Final answer
    x = 11,639.07

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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.