Home / 45,155.09-67,732.13-13,563.78

Finding the Fourth Proportional to 45,155.09, 67,732.13 and 13,563.78

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Solution

The fourth proportional to 45,155.09, 67,732.13 and 13,563.78 is: 20,345.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,155.09 : 67,732.13 = 13,563.78 : x
  2. Step 2: Convert to fraction form
    45,155.09/67,732.13 = 13,563.78/x
  3. Step 3: Cross multiply
    45,155.09x = 67,732.13 × 13,563.78
  4. Step 4: Simplify right side
    45,155.09x = 918,703,642.43
  5. Step 5: Solve for x
    x = 918,703,642.43/45,155.09
  6. Step 6: Final answer
    x = 20,345.52

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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.