Home / 19,679.40-29,519.10-12,292.20

Finding the Fourth Proportional to 19,679.40, 29,519.10 and 12,292.20

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Solution

The fourth proportional to 19,679.40, 29,519.10 and 12,292.20 is: 18,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.40 : 29,519.10 = 12,292.20 : x
  2. Step 2: Convert to fraction form
    19,679.40/29,519.10 = 12,292.20/x
  3. Step 3: Cross multiply
    19,679.40x = 29,519.10 × 12,292.20
  4. Step 4: Simplify right side
    19,679.40x = 362,854,681.02
  5. Step 5: Solve for x
    x = 362,854,681.02/19,679.40
  6. Step 6: Final answer
    x = 18,438.30

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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.