Home / 12,842.12-17,721.90-7,176.50

Finding the Fourth Proportional to 12,842.12, 17,721.90 and 7,176.50

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Solution

The fourth proportional to 12,842.12, 17,721.90 and 7,176.50 is: 9,903.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,842.12 : 17,721.90 = 7,176.50 : x
  2. Step 2: Convert to fraction form
    12,842.12/17,721.90 = 7,176.50/x
  3. Step 3: Cross multiply
    12,842.12x = 17,721.90 × 7,176.50
  4. Step 4: Simplify right side
    12,842.12x = 127,181,215.35
  5. Step 5: Solve for x
    x = 127,181,215.35/12,842.12
  6. Step 6: Final answer
    x = 9,903.44

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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.