Home / 11,509.12-15,878.10-6,472.18

Finding the Fourth Proportional to 11,509.12, 15,878.10 and 6,472.18

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Solution

The fourth proportional to 11,509.12, 15,878.10 and 6,472.18 is: 8,929.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,509.12 : 15,878.10 = 6,472.18 : x
  2. Step 2: Convert to fraction form
    11,509.12/15,878.10 = 6,472.18/x
  3. Step 3: Cross multiply
    11,509.12x = 15,878.10 × 6,472.18
  4. Step 4: Simplify right side
    11,509.12x = 102,765,921.26
  5. Step 5: Solve for x
    x = 102,765,921.26/11,509.12
  6. Step 6: Final answer
    x = 8,929.09

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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.