Home / 30,416.80-45,625.20-21,085.60

Finding the Fourth Proportional to 30,416.80, 45,625.20 and 21,085.60

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Solution

The fourth proportional to 30,416.80, 45,625.20 and 21,085.60 is: 31,628.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,416.80 : 45,625.20 = 21,085.60 : x
  2. Step 2: Convert to fraction form
    30,416.80/45,625.20 = 21,085.60/x
  3. Step 3: Cross multiply
    30,416.80x = 45,625.20 × 21,085.60
  4. Step 4: Simplify right side
    30,416.80x = 962,034,717.12
  5. Step 5: Solve for x
    x = 962,034,717.12/30,416.80
  6. Step 6: Final answer
    x = 31,628.40

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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.