Home / 30,279.90-45,419.85-28,311.60

Finding the Fourth Proportional to 30,279.90, 45,419.85 and 28,311.60

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Solution

The fourth proportional to 30,279.90, 45,419.85 and 28,311.60 is: 42,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,279.90 : 45,419.85 = 28,311.60 : x
  2. Step 2: Convert to fraction form
    30,279.90/45,419.85 = 28,311.60/x
  3. Step 3: Cross multiply
    30,279.90x = 45,419.85 × 28,311.60
  4. Step 4: Simplify right side
    30,279.90x = 1,285,908,625.26
  5. Step 5: Solve for x
    x = 1,285,908,625.26/30,279.90
  6. Step 6: Final answer
    x = 42,467.40

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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.