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Finding the Fourth Proportional to 9,133.60, 12,816.20 and 9,133.60

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Solution

The fourth proportional to 9,133.60, 12,816.20 and 9,133.60 is: 12,816.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,133.60 : 12,816.20 = 9,133.60 : x
  2. Step 2: Convert to fraction form
    9,133.60/12,816.20 = 9,133.60/x
  3. Step 3: Cross multiply
    9,133.60x = 12,816.20 × 9,133.60
  4. Step 4: Simplify right side
    9,133.60x = 117,058,044.32
  5. Step 5: Solve for x
    x = 117,058,044.32/9,133.60
  6. Step 6: Final answer
    x = 12,816.20

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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.