Home / 30,209.60-45,330.60-12,681.20

Finding the Fourth Proportional to 30,209.60, 45,330.60 and 12,681.20

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Solution

The fourth proportional to 30,209.60, 45,330.60 and 12,681.20 is: 19,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,209.60 : 45,330.60 = 12,681.20 : x
  2. Step 2: Convert to fraction form
    30,209.60/45,330.60 = 12,681.20/x
  3. Step 3: Cross multiply
    30,209.60x = 45,330.60 × 12,681.20
  4. Step 4: Simplify right side
    30,209.60x = 574,846,404.72
  5. Step 5: Solve for x
    x = 574,846,404.72/30,209.60
  6. Step 6: Final answer
    x = 19,028.60

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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.