Home / 12,739.65-17,575.89-9,390.48

Finding the Fourth Proportional to 12,739.65, 17,575.89 and 9,390.48

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Solution

The fourth proportional to 12,739.65, 17,575.89 and 9,390.48 is: 12,955.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.65 : 17,575.89 = 9,390.48 : x
  2. Step 2: Convert to fraction form
    12,739.65/17,575.89 = 9,390.48/x
  3. Step 3: Cross multiply
    12,739.65x = 17,575.89 × 9,390.48
  4. Step 4: Simplify right side
    12,739.65x = 165,046,043.53
  5. Step 5: Solve for x
    x = 165,046,043.53/12,739.65
  6. Step 6: Final answer
    x = 12,955.30

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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.