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Finding the Fourth Proportional to 13,207.20, 19,810.80 and 3,973.20

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Solution

The fourth proportional to 13,207.20, 19,810.80 and 3,973.20 is: 5,959.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,207.20 : 19,810.80 = 3,973.20 : x
  2. Step 2: Convert to fraction form
    13,207.20/19,810.80 = 3,973.20/x
  3. Step 3: Cross multiply
    13,207.20x = 19,810.80 × 3,973.20
  4. Step 4: Simplify right side
    13,207.20x = 78,712,270.56
  5. Step 5: Solve for x
    x = 78,712,270.56/13,207.20
  6. Step 6: Final answer
    x = 5,959.80

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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.