Home / 30,221.60-45,348.60-12,693.20

Finding the Fourth Proportional to 30,221.60, 45,348.60 and 12,693.20

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Solution

The fourth proportional to 30,221.60, 45,348.60 and 12,693.20 is: 19,046.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,221.60 : 45,348.60 = 12,693.20 : x
  2. Step 2: Convert to fraction form
    30,221.60/45,348.60 = 12,693.20/x
  3. Step 3: Cross multiply
    30,221.60x = 45,348.60 × 12,693.20
  4. Step 4: Simplify right side
    30,221.60x = 575,618,849.52
  5. Step 5: Solve for x
    x = 575,618,849.52/30,221.60
  6. Step 6: Final answer
    x = 19,046.60

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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.