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Finding the Fourth Proportional to 8,980.01, 12,390.53 and 5,202.95

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Solution

The fourth proportional to 8,980.01, 12,390.53 and 5,202.95 is: 7,178.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.01 : 12,390.53 = 5,202.95 : x
  2. Step 2: Convert to fraction form
    8,980.01/12,390.53 = 5,202.95/x
  3. Step 3: Cross multiply
    8,980.01x = 12,390.53 × 5,202.95
  4. Step 4: Simplify right side
    8,980.01x = 64,467,220.10
  5. Step 5: Solve for x
    x = 64,467,220.10/8,980.01
  6. Step 6: Final answer
    x = 7,178.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.