Home / 19,113.12-28,679.28-11,321.76

Finding the Fourth Proportional to 19,113.12, 28,679.28 and 11,321.76

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Solution

The fourth proportional to 19,113.12, 28,679.28 and 11,321.76 is: 16,988.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,113.12 : 28,679.28 = 11,321.76 : x
  2. Step 2: Convert to fraction form
    19,113.12/28,679.28 = 11,321.76/x
  3. Step 3: Cross multiply
    19,113.12x = 28,679.28 × 11,321.76
  4. Step 4: Simplify right side
    19,113.12x = 324,699,925.13
  5. Step 5: Solve for x
    x = 324,699,925.13/19,113.12
  6. Step 6: Final answer
    x = 16,988.33

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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.