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Finding the Fourth Proportional to 10,015.69, 13,809.10 and 6,424.32

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Solution

The fourth proportional to 10,015.69, 13,809.10 and 6,424.32 is: 8,857.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,015.69 : 13,809.10 = 6,424.32 : x
  2. Step 2: Convert to fraction form
    10,015.69/13,809.10 = 6,424.32/x
  3. Step 3: Cross multiply
    10,015.69x = 13,809.10 × 6,424.32
  4. Step 4: Simplify right side
    10,015.69x = 88,714,077.31
  5. Step 5: Solve for x
    x = 88,714,077.31/10,015.69
  6. Step 6: Final answer
    x = 8,857.51

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.