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Finding the Fourth Proportional to 10,980.78, 15,120.99 and 10,750.74

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Solution

The fourth proportional to 10,980.78, 15,120.99 and 10,750.74 is: 14,804.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,980.78 : 15,120.99 = 10,750.74 : x
  2. Step 2: Convert to fraction form
    10,980.78/15,120.99 = 10,750.74/x
  3. Step 3: Cross multiply
    10,980.78x = 15,120.99 × 10,750.74
  4. Step 4: Simplify right side
    10,980.78x = 162,561,832.03
  5. Step 5: Solve for x
    x = 162,561,832.03/10,980.78
  6. Step 6: Final answer
    x = 14,804.22

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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.