Home / 12,985.38-19,463.76-8,290.62

Finding the Fourth Proportional to 12,985.38, 19,463.76 and 8,290.62

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Solution

The fourth proportional to 12,985.38, 19,463.76 and 8,290.62 is: 12,426.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.38 : 19,463.76 = 8,290.62 : x
  2. Step 2: Convert to fraction form
    12,985.38/19,463.76 = 8,290.62/x
  3. Step 3: Cross multiply
    12,985.38x = 19,463.76 × 8,290.62
  4. Step 4: Simplify right side
    12,985.38x = 161,366,637.93
  5. Step 5: Solve for x
    x = 161,366,637.93/12,985.38
  6. Step 6: Final answer
    x = 12,426.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.