Home / 28,113.68-42,135.96-12,513.68

Finding the Fourth Proportional to 28,113.68, 42,135.96 and 12,513.68

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Solution

The fourth proportional to 28,113.68, 42,135.96 and 12,513.68 is: 18,755.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.68 : 42,135.96 = 12,513.68 : x
  2. Step 2: Convert to fraction form
    28,113.68/42,135.96 = 12,513.68/x
  3. Step 3: Cross multiply
    28,113.68x = 42,135.96 × 12,513.68
  4. Step 4: Simplify right side
    28,113.68x = 527,275,919.93
  5. Step 5: Solve for x
    x = 527,275,919.93/28,113.68
  6. Step 6: Final answer
    x = 18,755.14

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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.