Home / 20,129.71-27,764.54-12,470.50

Finding the Fourth Proportional to 20,129.71, 27,764.54 and 12,470.50

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Solution

The fourth proportional to 20,129.71, 27,764.54 and 12,470.50 is: 17,200.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.71 : 27,764.54 = 12,470.50 : x
  2. Step 2: Convert to fraction form
    20,129.71/27,764.54 = 12,470.50/x
  3. Step 3: Cross multiply
    20,129.71x = 27,764.54 × 12,470.50
  4. Step 4: Simplify right side
    20,129.71x = 346,237,494.89
  5. Step 5: Solve for x
    x = 346,237,494.89/20,129.71
  6. Step 6: Final answer
    x = 17,200.33

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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.