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Finding the Fourth Proportional to 9,411.60, 14,133.60 and 6,139.20

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Solution

The fourth proportional to 9,411.60, 14,133.60 and 6,139.20 is: 9,219.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,411.60 : 14,133.60 = 6,139.20 : x
  2. Step 2: Convert to fraction form
    9,411.60/14,133.60 = 6,139.20/x
  3. Step 3: Cross multiply
    9,411.60x = 14,133.60 × 6,139.20
  4. Step 4: Simplify right side
    9,411.60x = 86,768,997.12
  5. Step 5: Solve for x
    x = 86,768,997.12/9,411.60
  6. Step 6: Final answer
    x = 9,219.37

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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.