Home / 13,091.80-18,066.90-7,123.72

Finding the Fourth Proportional to 13,091.80, 18,066.90 and 7,123.72

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Solution

The fourth proportional to 13,091.80, 18,066.90 and 7,123.72 is: 9,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.80 : 18,066.90 = 7,123.72 : x
  2. Step 2: Convert to fraction form
    13,091.80/18,066.90 = 7,123.72/x
  3. Step 3: Cross multiply
    13,091.80x = 18,066.90 × 7,123.72
  4. Step 4: Simplify right side
    13,091.80x = 128,703,536.87
  5. Step 5: Solve for x
    x = 128,703,536.87/13,091.80
  6. Step 6: Final answer
    x = 9,830.85

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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.