Home / 28,235.88-38,970.18-15,664.68

Finding the Fourth Proportional to 28,235.88, 38,970.18 and 15,664.68

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Solution

The fourth proportional to 28,235.88, 38,970.18 and 15,664.68 is: 21,619.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,235.88 : 38,970.18 = 15,664.68 : x
  2. Step 2: Convert to fraction form
    28,235.88/38,970.18 = 15,664.68/x
  3. Step 3: Cross multiply
    28,235.88x = 38,970.18 × 15,664.68
  4. Step 4: Simplify right side
    28,235.88x = 610,455,399.24
  5. Step 5: Solve for x
    x = 610,455,399.24/28,235.88
  6. Step 6: Final answer
    x = 21,619.85

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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.