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Finding the Fourth Proportional to 10,491.60, 15,769.80 and 10,297.20

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Solution

The fourth proportional to 10,491.60, 15,769.80 and 10,297.20 is: 15,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,491.60 : 15,769.80 = 10,297.20 : x
  2. Step 2: Convert to fraction form
    10,491.60/15,769.80 = 10,297.20/x
  3. Step 3: Cross multiply
    10,491.60x = 15,769.80 × 10,297.20
  4. Step 4: Simplify right side
    10,491.60x = 162,384,784.56
  5. Step 5: Solve for x
    x = 162,384,784.56/10,491.60
  6. Step 6: Final answer
    x = 15,477.60

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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.