Home / 20,319.48-28,043-11,705.97

Finding the Fourth Proportional to 20,319.48, 28,043 and 11,705.97

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Solution

The fourth proportional to 20,319.48, 28,043 and 11,705.97 is: 16,155.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.48 : 28,043 = 11,705.97 : x
  2. Step 2: Convert to fraction form
    20,319.48/28,043 = 11,705.97/x
  3. Step 3: Cross multiply
    20,319.48x = 28,043 × 11,705.97
  4. Step 4: Simplify right side
    20,319.48x = 328,270,516.71
  5. Step 5: Solve for x
    x = 328,270,516.71/20,319.48
  6. Step 6: Final answer
    x = 16,155.46

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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.