Home / 28,005.12-38,644.74-15,429.84

Finding the Fourth Proportional to 28,005.12, 38,644.74 and 15,429.84

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Solution

The fourth proportional to 28,005.12, 38,644.74 and 15,429.84 is: 21,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.12 : 38,644.74 = 15,429.84 : x
  2. Step 2: Convert to fraction form
    28,005.12/38,644.74 = 15,429.84/x
  3. Step 3: Cross multiply
    28,005.12x = 38,644.74 × 15,429.84
  4. Step 4: Simplify right side
    28,005.12x = 596,282,155.04
  5. Step 5: Solve for x
    x = 596,282,155.04/28,005.12
  6. Step 6: Final answer
    x = 21,291.90

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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.