Home / 18,901.38-28,291.45-12,561.71

Finding the Fourth Proportional to 18,901.38, 28,291.45 and 12,561.71

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Solution

The fourth proportional to 18,901.38, 28,291.45 and 12,561.71 is: 18,802.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,901.38 : 28,291.45 = 12,561.71 : x
  2. Step 2: Convert to fraction form
    18,901.38/28,291.45 = 12,561.71/x
  3. Step 3: Cross multiply
    18,901.38x = 28,291.45 × 12,561.71
  4. Step 4: Simplify right side
    18,901.38x = 355,388,955.97
  5. Step 5: Solve for x
    x = 355,388,955.97/18,901.38
  6. Step 6: Final answer
    x = 18,802.28

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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.