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Finding the Fourth Proportional to 10,313.70, 15,477.03 and 6,420.30

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Solution

The fourth proportional to 10,313.70, 15,477.03 and 6,420.30 is: 9,634.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,313.70 : 15,477.03 = 6,420.30 : x
  2. Step 2: Convert to fraction form
    10,313.70/15,477.03 = 6,420.30/x
  3. Step 3: Cross multiply
    10,313.70x = 15,477.03 × 6,420.30
  4. Step 4: Simplify right side
    10,313.70x = 99,367,175.71
  5. Step 5: Solve for x
    x = 99,367,175.71/10,313.70
  6. Step 6: Final answer
    x = 9,634.48

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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.