Home / 20,485.71-28,276.70-13,771.62

Finding the Fourth Proportional to 20,485.71, 28,276.70 and 13,771.62

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Solution

The fourth proportional to 20,485.71, 28,276.70 and 13,771.62 is: 19,009.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.71 : 28,276.70 = 13,771.62 : x
  2. Step 2: Convert to fraction form
    20,485.71/28,276.70 = 13,771.62/x
  3. Step 3: Cross multiply
    20,485.71x = 28,276.70 × 13,771.62
  4. Step 4: Simplify right side
    20,485.71x = 389,415,898.40
  5. Step 5: Solve for x
    x = 389,415,898.40/20,485.71
  6. Step 6: Final answer
    x = 19,009.15

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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.