Home / 28,143.79-42,215.73-11,503.81

Finding the Fourth Proportional to 28,143.79, 42,215.73 and 11,503.81

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Solution

The fourth proportional to 28,143.79, 42,215.73 and 11,503.81 is: 17,255.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.79 : 42,215.73 = 11,503.81 : x
  2. Step 2: Convert to fraction form
    28,143.79/42,215.73 = 11,503.81/x
  3. Step 3: Cross multiply
    28,143.79x = 42,215.73 × 11,503.81
  4. Step 4: Simplify right side
    28,143.79x = 485,641,525.85
  5. Step 5: Solve for x
    x = 485,641,525.85/28,143.79
  6. Step 6: Final answer
    x = 17,255.73

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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.