Home / 20,871.96-28,802.40-12,493.08

Finding the Fourth Proportional to 20,871.96, 28,802.40 and 12,493.08

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Solution

The fourth proportional to 20,871.96, 28,802.40 and 12,493.08 is: 17,239.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.96 : 28,802.40 = 12,493.08 : x
  2. Step 2: Convert to fraction form
    20,871.96/28,802.40 = 12,493.08/x
  3. Step 3: Cross multiply
    20,871.96x = 28,802.40 × 12,493.08
  4. Step 4: Simplify right side
    20,871.96x = 359,830,687.39
  5. Step 5: Solve for x
    x = 359,830,687.39/20,871.96
  6. Step 6: Final answer
    x = 17,239.91

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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.