Home / 30,078.27-45,117.63-13,439.07

Finding the Fourth Proportional to 30,078.27, 45,117.63 and 13,439.07

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Solution

The fourth proportional to 30,078.27, 45,117.63 and 13,439.07 is: 20,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,078.27 : 45,117.63 = 13,439.07 : x
  2. Step 2: Convert to fraction form
    30,078.27/45,117.63 = 13,439.07/x
  3. Step 3: Cross multiply
    30,078.27x = 45,117.63 × 13,439.07
  4. Step 4: Simplify right side
    30,078.27x = 606,338,987.80
  5. Step 5: Solve for x
    x = 606,338,987.80/30,078.27
  6. Step 6: Final answer
    x = 20,158.71

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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.