Home / 12,930.05-17,845.40-7,897.19

Finding the Fourth Proportional to 12,930.05, 17,845.40 and 7,897.19

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Solution

The fourth proportional to 12,930.05, 17,845.40 and 7,897.19 is: 10,899.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.05 : 17,845.40 = 7,897.19 : x
  2. Step 2: Convert to fraction form
    12,930.05/17,845.40 = 7,897.19/x
  3. Step 3: Cross multiply
    12,930.05x = 17,845.40 × 7,897.19
  4. Step 4: Simplify right side
    12,930.05x = 140,928,444.94
  5. Step 5: Solve for x
    x = 140,928,444.94/12,930.05
  6. Step 6: Final answer
    x = 10,899.29

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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.