Home / 12,631.54-17,430.80-7,851.36

Finding the Fourth Proportional to 12,631.54, 17,430.80 and 7,851.36

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Solution

The fourth proportional to 12,631.54, 17,430.80 and 7,851.36 is: 10,834.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.54 : 17,430.80 = 7,851.36 : x
  2. Step 2: Convert to fraction form
    12,631.54/17,430.80 = 7,851.36/x
  3. Step 3: Cross multiply
    12,631.54x = 17,430.80 × 7,851.36
  4. Step 4: Simplify right side
    12,631.54x = 136,855,485.89
  5. Step 5: Solve for x
    x = 136,855,485.89/12,631.54
  6. Step 6: Final answer
    x = 10,834.43

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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.