Home / 11,101.47-15,330.26-7,129.50

Finding the Fourth Proportional to 11,101.47, 15,330.26 and 7,129.50

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Solution

The fourth proportional to 11,101.47, 15,330.26 and 7,129.50 is: 9,845.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.47 : 15,330.26 = 7,129.50 : x
  2. Step 2: Convert to fraction form
    11,101.47/15,330.26 = 7,129.50/x
  3. Step 3: Cross multiply
    11,101.47x = 15,330.26 × 7,129.50
  4. Step 4: Simplify right side
    11,101.47x = 109,297,111.84
  5. Step 5: Solve for x
    x = 109,297,111.84/11,101.47
  6. Step 6: Final answer
    x = 9,845.28

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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.