Home / 30,635.40-45,980.10-18,139.80

Finding the Fourth Proportional to 30,635.40, 45,980.10 and 18,139.80

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Solution

The fourth proportional to 30,635.40, 45,980.10 and 18,139.80 is: 27,225.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,635.40 : 45,980.10 = 18,139.80 : x
  2. Step 2: Convert to fraction form
    30,635.40/45,980.10 = 18,139.80/x
  3. Step 3: Cross multiply
    30,635.40x = 45,980.10 × 18,139.80
  4. Step 4: Simplify right side
    30,635.40x = 834,069,817.98
  5. Step 5: Solve for x
    x = 834,069,817.98/30,635.40
  6. Step 6: Final answer
    x = 27,225.69

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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.