Home / 19,185.30-28,777.95-11,428.74

Finding the Fourth Proportional to 19,185.30, 28,777.95 and 11,428.74

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Solution

The fourth proportional to 19,185.30, 28,777.95 and 11,428.74 is: 17,143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,185.30 : 28,777.95 = 11,428.74 : x
  2. Step 2: Convert to fraction form
    19,185.30/28,777.95 = 11,428.74/x
  3. Step 3: Cross multiply
    19,185.30x = 28,777.95 × 11,428.74
  4. Step 4: Simplify right side
    19,185.30x = 328,895,708.28
  5. Step 5: Solve for x
    x = 328,895,708.28/19,185.30
  6. Step 6: Final answer
    x = 17,143.11

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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.