Home / 30,276.60-45,431.10-12,748.20

Finding the Fourth Proportional to 30,276.60, 45,431.10 and 12,748.20

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Solution

The fourth proportional to 30,276.60, 45,431.10 and 12,748.20 is: 19,129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,276.60 : 45,431.10 = 12,748.20 : x
  2. Step 2: Convert to fraction form
    30,276.60/45,431.10 = 12,748.20/x
  3. Step 3: Cross multiply
    30,276.60x = 45,431.10 × 12,748.20
  4. Step 4: Simplify right side
    30,276.60x = 579,164,749.02
  5. Step 5: Solve for x
    x = 579,164,749.02/30,276.60
  6. Step 6: Final answer
    x = 19,129.12

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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.