Home / 12,687.27-19,030.91-7,490.31

Finding the Fourth Proportional to 12,687.27, 19,030.91 and 7,490.31

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Solution

The fourth proportional to 12,687.27, 19,030.91 and 7,490.31 is: 11,235.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.27 : 19,030.91 = 7,490.31 : x
  2. Step 2: Convert to fraction form
    12,687.27/19,030.91 = 7,490.31/x
  3. Step 3: Cross multiply
    12,687.27x = 19,030.91 × 7,490.31
  4. Step 4: Simplify right side
    12,687.27x = 142,547,378.03
  5. Step 5: Solve for x
    x = 142,547,378.03/12,687.27
  6. Step 6: Final answer
    x = 11,235.47

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Similar ratio
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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.