Home / 19,118.88-28,691.28-7,430.58

Finding the Fourth Proportional to 19,118.88, 28,691.28 and 7,430.58

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Solution

The fourth proportional to 19,118.88, 28,691.28 and 7,430.58 is: 11,150.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,118.88 : 28,691.28 = 7,430.58 : x
  2. Step 2: Convert to fraction form
    19,118.88/28,691.28 = 7,430.58/x
  3. Step 3: Cross multiply
    19,118.88x = 28,691.28 × 7,430.58
  4. Step 4: Simplify right side
    19,118.88x = 213,192,851.34
  5. Step 5: Solve for x
    x = 213,192,851.34/19,118.88
  6. Step 6: Final answer
    x = 11,150.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.