Home / 20,994.36-31,337.93-18,503.31

Finding the Fourth Proportional to 20,994.36, 31,337.93 and 18,503.31

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Solution

The fourth proportional to 20,994.36, 31,337.93 and 18,503.31 is: 27,619.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.36 : 31,337.93 = 18,503.31 : x
  2. Step 2: Convert to fraction form
    20,994.36/31,337.93 = 18,503.31/x
  3. Step 3: Cross multiply
    20,994.36x = 31,337.93 × 18,503.31
  4. Step 4: Simplify right side
    20,994.36x = 579,855,433.55
  5. Step 5: Solve for x
    x = 579,855,433.55/20,994.36
  6. Step 6: Final answer
    x = 27,619.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.