Home / 30,519.90-45,743.40-15,721.20

Finding the Fourth Proportional to 30,519.90, 45,743.40 and 15,721.20

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Solution

The fourth proportional to 30,519.90, 45,743.40 and 15,721.20 is: 23,563.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,519.90 : 45,743.40 = 15,721.20 : x
  2. Step 2: Convert to fraction form
    30,519.90/45,743.40 = 15,721.20/x
  3. Step 3: Cross multiply
    30,519.90x = 45,743.40 × 15,721.20
  4. Step 4: Simplify right side
    30,519.90x = 719,141,140.08
  5. Step 5: Solve for x
    x = 719,141,140.08/30,519.90
  6. Step 6: Final answer
    x = 23,563.02

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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.