Home / 20,875.73-28,808.60-11,315.77

Finding the Fourth Proportional to 20,875.73, 28,808.60 and 11,315.77

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Solution

The fourth proportional to 20,875.73, 28,808.60 and 11,315.77 is: 15,615.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.73 : 28,808.60 = 11,315.77 : x
  2. Step 2: Convert to fraction form
    20,875.73/28,808.60 = 11,315.77/x
  3. Step 3: Cross multiply
    20,875.73x = 28,808.60 × 11,315.77
  4. Step 4: Simplify right side
    20,875.73x = 325,991,363.02
  5. Step 5: Solve for x
    x = 325,991,363.02/20,875.73
  6. Step 6: Final answer
    x = 15,615.81

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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.