Home / 11,128.48-15,345.36-9,379.36

Finding the Fourth Proportional to 11,128.48, 15,345.36 and 9,379.36

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Solution

The fourth proportional to 11,128.48, 15,345.36 and 9,379.36 is: 12,933.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.48 : 15,345.36 = 9,379.36 : x
  2. Step 2: Convert to fraction form
    11,128.48/15,345.36 = 9,379.36/x
  3. Step 3: Cross multiply
    11,128.48x = 15,345.36 × 9,379.36
  4. Step 4: Simplify right side
    11,128.48x = 143,929,655.77
  5. Step 5: Solve for x
    x = 143,929,655.77/11,128.48
  6. Step 6: Final answer
    x = 12,933.45

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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.