Home / 21,285.28-31,947.61-10,762.77

Finding the Fourth Proportional to 21,285.28, 31,947.61 and 10,762.77

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Solution

The fourth proportional to 21,285.28, 31,947.61 and 10,762.77 is: 16,154.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.28 : 31,947.61 = 10,762.77 : x
  2. Step 2: Convert to fraction form
    21,285.28/31,947.61 = 10,762.77/x
  3. Step 3: Cross multiply
    21,285.28x = 31,947.61 × 10,762.77
  4. Step 4: Simplify right side
    21,285.28x = 343,844,751.57
  5. Step 5: Solve for x
    x = 343,844,751.57/21,285.28
  6. Step 6: Final answer
    x = 16,154.11

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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.