Home / 19,784.10-29,676.15-18,909.30

Finding the Fourth Proportional to 19,784.10, 29,676.15 and 18,909.30

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Solution

The fourth proportional to 19,784.10, 29,676.15 and 18,909.30 is: 28,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,784.10 : 29,676.15 = 18,909.30 : x
  2. Step 2: Convert to fraction form
    19,784.10/29,676.15 = 18,909.30/x
  3. Step 3: Cross multiply
    19,784.10x = 29,676.15 × 18,909.30
  4. Step 4: Simplify right side
    19,784.10x = 561,155,223.20
  5. Step 5: Solve for x
    x = 561,155,223.20/19,784.10
  6. Step 6: Final answer
    x = 28,363.95

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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.