Home / 27,772.80-41,678.40-19,987.20

Finding the Fourth Proportional to 27,772.80, 41,678.40 and 19,987.20

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Solution

The fourth proportional to 27,772.80, 41,678.40 and 19,987.20 is: 29,994.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,772.80 : 41,678.40 = 19,987.20 : x
  2. Step 2: Convert to fraction form
    27,772.80/41,678.40 = 19,987.20/x
  3. Step 3: Cross multiply
    27,772.80x = 41,678.40 × 19,987.20
  4. Step 4: Simplify right side
    27,772.80x = 833,034,516.48
  5. Step 5: Solve for x
    x = 833,034,516.48/27,772.80
  6. Step 6: Final answer
    x = 29,994.62

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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.