Home / 19,140.24-28,669.80-15,422.40

Finding the Fourth Proportional to 19,140.24, 28,669.80 and 15,422.40

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Solution

The fourth proportional to 19,140.24, 28,669.80 and 15,422.40 is: 23,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.24 : 28,669.80 = 15,422.40 : x
  2. Step 2: Convert to fraction form
    19,140.24/28,669.80 = 15,422.40/x
  3. Step 3: Cross multiply
    19,140.24x = 28,669.80 × 15,422.40
  4. Step 4: Simplify right side
    19,140.24x = 442,157,123.52
  5. Step 5: Solve for x
    x = 442,157,123.52/19,140.24
  6. Step 6: Final answer
    x = 23,100.92

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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.