Home / 19,987.20-30,005.10-19,841.40

Finding the Fourth Proportional to 19,987.20, 30,005.10 and 19,841.40

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Solution

The fourth proportional to 19,987.20, 30,005.10 and 19,841.40 is: 29,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.20 : 30,005.10 = 19,841.40 : x
  2. Step 2: Convert to fraction form
    19,987.20/30,005.10 = 19,841.40/x
  3. Step 3: Cross multiply
    19,987.20x = 30,005.10 × 19,841.40
  4. Step 4: Simplify right side
    19,987.20x = 595,343,191.14
  5. Step 5: Solve for x
    x = 595,343,191.14/19,987.20
  6. Step 6: Final answer
    x = 29,786.22

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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.