Home / 30,308.34-45,468.72-12,778.20

Finding the Fourth Proportional to 30,308.34, 45,468.72 and 12,778.20

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Solution

The fourth proportional to 30,308.34, 45,468.72 and 12,778.20 is: 19,169.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,308.34 : 45,468.72 = 12,778.20 : x
  2. Step 2: Convert to fraction form
    30,308.34/45,468.72 = 12,778.20/x
  3. Step 3: Cross multiply
    30,308.34x = 45,468.72 × 12,778.20
  4. Step 4: Simplify right side
    30,308.34x = 581,008,397.90
  5. Step 5: Solve for x
    x = 581,008,397.90/30,308.34
  6. Step 6: Final answer
    x = 19,169.92

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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.