Home / 11,102.30-15,328.01-7,130.42

Finding the Fourth Proportional to 11,102.30, 15,328.01 and 7,130.42

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Solution

The fourth proportional to 11,102.30, 15,328.01 and 7,130.42 is: 9,844.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,102.30 : 15,328.01 = 7,130.42 : x
  2. Step 2: Convert to fraction form
    11,102.30/15,328.01 = 7,130.42/x
  3. Step 3: Cross multiply
    11,102.30x = 15,328.01 × 7,130.42
  4. Step 4: Simplify right side
    11,102.30x = 109,295,036.77
  5. Step 5: Solve for x
    x = 109,295,036.77/11,102.30
  6. Step 6: Final answer
    x = 9,844.36

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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.