Home / 30,600.78-45,900.50-12,585.21

Finding the Fourth Proportional to 30,600.78, 45,900.50 and 12,585.21

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Solution

The fourth proportional to 30,600.78, 45,900.50 and 12,585.21 is: 18,877.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,600.78 : 45,900.50 = 12,585.21 : x
  2. Step 2: Convert to fraction form
    30,600.78/45,900.50 = 12,585.21/x
  3. Step 3: Cross multiply
    30,600.78x = 45,900.50 × 12,585.21
  4. Step 4: Simplify right side
    30,600.78x = 577,667,368.68
  5. Step 5: Solve for x
    x = 577,667,368.68/30,600.78
  6. Step 6: Final answer
    x = 18,877.54

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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.