Home / 30,442.40-45,663.60-18,778.40

Finding the Fourth Proportional to 30,442.40, 45,663.60 and 18,778.40

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Solution

The fourth proportional to 30,442.40, 45,663.60 and 18,778.40 is: 28,167.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,442.40 : 45,663.60 = 18,778.40 : x
  2. Step 2: Convert to fraction form
    30,442.40/45,663.60 = 18,778.40/x
  3. Step 3: Cross multiply
    30,442.40x = 45,663.60 × 18,778.40
  4. Step 4: Simplify right side
    30,442.40x = 857,489,346.24
  5. Step 5: Solve for x
    x = 857,489,346.24/30,442.40
  6. Step 6: Final answer
    x = 28,167.60

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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.