Home / 21,006.70-31,473.60-13,607.35

Finding the Fourth Proportional to 21,006.70, 31,473.60 and 13,607.35

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Solution

The fourth proportional to 21,006.70, 31,473.60 and 13,607.35 is: 20,387.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.70 : 31,473.60 = 13,607.35 : x
  2. Step 2: Convert to fraction form
    21,006.70/31,473.60 = 13,607.35/x
  3. Step 3: Cross multiply
    21,006.70x = 31,473.60 × 13,607.35
  4. Step 4: Simplify right side
    21,006.70x = 428,272,290.96
  5. Step 5: Solve for x
    x = 428,272,290.96/21,006.70
  6. Step 6: Final answer
    x = 20,387.41

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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.