Home / 28,512.83-39,347.00-15,765.68

Finding the Fourth Proportional to 28,512.83, 39,347.00 and 15,765.68

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Solution

The fourth proportional to 28,512.83, 39,347.00 and 15,765.68 is: 21,756.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.83 : 39,347.00 = 15,765.68 : x
  2. Step 2: Convert to fraction form
    28,512.83/39,347.00 = 15,765.68/x
  3. Step 3: Cross multiply
    28,512.83x = 39,347.00 × 15,765.68
  4. Step 4: Simplify right side
    28,512.83x = 620,331,935.40
  5. Step 5: Solve for x
    x = 620,331,935.40/28,512.83
  6. Step 6: Final answer
    x = 21,756.24

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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.