Home / 28,260.72-39,003.12-15,686.28

Finding the Fourth Proportional to 28,260.72, 39,003.12 and 15,686.28

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Solution

The fourth proportional to 28,260.72, 39,003.12 and 15,686.28 is: 21,648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,260.72 : 39,003.12 = 15,686.28 : x
  2. Step 2: Convert to fraction form
    28,260.72/39,003.12 = 15,686.28/x
  3. Step 3: Cross multiply
    28,260.72x = 39,003.12 × 15,686.28
  4. Step 4: Simplify right side
    28,260.72x = 611,813,861.19
  5. Step 5: Solve for x
    x = 611,813,861.19/28,260.72
  6. Step 6: Final answer
    x = 21,648.91

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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.