Home / 20,318.97-28,045.40-12,366.81

Finding the Fourth Proportional to 20,318.97, 28,045.40 and 12,366.81

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Solution

The fourth proportional to 20,318.97, 28,045.40 and 12,366.81 is: 17,069.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.97 : 28,045.40 = 12,366.81 : x
  2. Step 2: Convert to fraction form
    20,318.97/28,045.40 = 12,366.81/x
  3. Step 3: Cross multiply
    20,318.97x = 28,045.40 × 12,366.81
  4. Step 4: Simplify right side
    20,318.97x = 346,832,071.34
  5. Step 5: Solve for x
    x = 346,832,071.34/20,318.97
  6. Step 6: Final answer
    x = 17,069.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.