Home / 30,218.60-45,344.10-12,690.20

Finding the Fourth Proportional to 30,218.60, 45,344.10 and 12,690.20

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Solution

The fourth proportional to 30,218.60, 45,344.10 and 12,690.20 is: 19,042.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,218.60 : 45,344.10 = 12,690.20 : x
  2. Step 2: Convert to fraction form
    30,218.60/45,344.10 = 12,690.20/x
  3. Step 3: Cross multiply
    30,218.60x = 45,344.10 × 12,690.20
  4. Step 4: Simplify right side
    30,218.60x = 575,425,697.82
  5. Step 5: Solve for x
    x = 575,425,697.82/30,218.60
  6. Step 6: Final answer
    x = 19,042.10

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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.