Home / 19,619.58-29,420.16-7,130.80

Finding the Fourth Proportional to 19,619.58, 29,420.16 and 7,130.80

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Solution

The fourth proportional to 19,619.58, 29,420.16 and 7,130.80 is: 10,692.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.58 : 29,420.16 = 7,130.80 : x
  2. Step 2: Convert to fraction form
    19,619.58/29,420.16 = 7,130.80/x
  3. Step 3: Cross multiply
    19,619.58x = 29,420.16 × 7,130.80
  4. Step 4: Simplify right side
    19,619.58x = 209,789,276.93
  5. Step 5: Solve for x
    x = 209,789,276.93/19,619.58
  6. Step 6: Final answer
    x = 10,692.85

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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.