Home / 12,565.40-18,866.70-7,029.80

Finding the Fourth Proportional to 12,565.40, 18,866.70 and 7,029.80

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Solution

The fourth proportional to 12,565.40, 18,866.70 and 7,029.80 is: 10,555.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,565.40 : 18,866.70 = 7,029.80 : x
  2. Step 2: Convert to fraction form
    12,565.40/18,866.70 = 7,029.80/x
  3. Step 3: Cross multiply
    12,565.40x = 18,866.70 × 7,029.80
  4. Step 4: Simplify right side
    12,565.40x = 132,629,127.66
  5. Step 5: Solve for x
    x = 132,629,127.66/12,565.40
  6. Step 6: Final answer
    x = 10,555.11

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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.