Home / 30,190.40-45,307.20-12,672.80

Finding the Fourth Proportional to 30,190.40, 45,307.20 and 12,672.80

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Solution

The fourth proportional to 30,190.40, 45,307.20 and 12,672.80 is: 19,018.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,190.40 : 45,307.20 = 12,672.80 : x
  2. Step 2: Convert to fraction form
    30,190.40/45,307.20 = 12,672.80/x
  3. Step 3: Cross multiply
    30,190.40x = 45,307.20 × 12,672.80
  4. Step 4: Simplify right side
    30,190.40x = 574,169,084.16
  5. Step 5: Solve for x
    x = 574,169,084.16/30,190.40
  6. Step 6: Final answer
    x = 19,018.27

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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.