Home / 21,004.70-31,470.60-13,605.35

Finding the Fourth Proportional to 21,004.70, 31,470.60 and 13,605.35

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Solution

The fourth proportional to 21,004.70, 31,470.60 and 13,605.35 is: 20,384.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.70 : 31,470.60 = 13,605.35 : x
  2. Step 2: Convert to fraction form
    21,004.70/31,470.60 = 13,605.35/x
  3. Step 3: Cross multiply
    21,004.70x = 31,470.60 × 13,605.35
  4. Step 4: Simplify right side
    21,004.70x = 428,168,527.71
  5. Step 5: Solve for x
    x = 428,168,527.71/21,004.70
  6. Step 6: Final answer
    x = 20,384.42

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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.