Home / 20,143.89-30,228.95-7,664.02

Finding the Fourth Proportional to 20,143.89, 30,228.95 and 7,664.02

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Solution

The fourth proportional to 20,143.89, 30,228.95 and 7,664.02 is: 11,501.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.89 : 30,228.95 = 7,664.02 : x
  2. Step 2: Convert to fraction form
    20,143.89/30,228.95 = 7,664.02/x
  3. Step 3: Cross multiply
    20,143.89x = 30,228.95 × 7,664.02
  4. Step 4: Simplify right side
    20,143.89x = 231,675,283.61
  5. Step 5: Solve for x
    x = 231,675,283.61/20,143.89
  6. Step 6: Final answer
    x = 11,501.02

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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.