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Finding the Fourth Proportional to 9,077.10, 12,720.90 and 9,077.10

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Solution

The fourth proportional to 9,077.10, 12,720.90 and 9,077.10 is: 12,720.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,077.10 : 12,720.90 = 9,077.10 : x
  2. Step 2: Convert to fraction form
    9,077.10/12,720.90 = 9,077.10/x
  3. Step 3: Cross multiply
    9,077.10x = 12,720.90 × 9,077.10
  4. Step 4: Simplify right side
    9,077.10x = 115,468,881.39
  5. Step 5: Solve for x
    x = 115,468,881.39/9,077.10
  6. Step 6: Final answer
    x = 12,720.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.