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Finding the Fourth Proportional to 10,617.60, 15,907.20 and 9,388.80

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Solution

The fourth proportional to 10,617.60, 15,907.20 and 9,388.80 is: 14,066.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,617.60 : 15,907.20 = 9,388.80 : x
  2. Step 2: Convert to fraction form
    10,617.60/15,907.20 = 9,388.80/x
  3. Step 3: Cross multiply
    10,617.60x = 15,907.20 × 9,388.80
  4. Step 4: Simplify right side
    10,617.60x = 149,349,519.36
  5. Step 5: Solve for x
    x = 149,349,519.36/10,617.60
  6. Step 6: Final answer
    x = 14,066.22

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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.