Home / 12,729.63-17,567.09-7,140.63

Finding the Fourth Proportional to 12,729.63, 17,567.09 and 7,140.63

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Solution

The fourth proportional to 12,729.63, 17,567.09 and 7,140.63 is: 9,854.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.63 : 17,567.09 = 7,140.63 : x
  2. Step 2: Convert to fraction form
    12,729.63/17,567.09 = 7,140.63/x
  3. Step 3: Cross multiply
    12,729.63x = 17,567.09 × 7,140.63
  4. Step 4: Simplify right side
    12,729.63x = 125,440,089.87
  5. Step 5: Solve for x
    x = 125,440,089.87/12,729.63
  6. Step 6: Final answer
    x = 9,854.18

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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.