Home / 19,655.20-29,434.20-18,780.40

Finding the Fourth Proportional to 19,655.20, 29,434.20 and 18,780.40

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Solution

The fourth proportional to 19,655.20, 29,434.20 and 18,780.40 is: 28,124.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,655.20 : 29,434.20 = 18,780.40 : x
  2. Step 2: Convert to fraction form
    19,655.20/29,434.20 = 18,780.40/x
  3. Step 3: Cross multiply
    19,655.20x = 29,434.20 × 18,780.40
  4. Step 4: Simplify right side
    19,655.20x = 552,786,049.68
  5. Step 5: Solve for x
    x = 552,786,049.68/19,655.20
  6. Step 6: Final answer
    x = 28,124.16

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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.