Home / 28,165.74-38,827.32-21,439.65

Finding the Fourth Proportional to 28,165.74, 38,827.32 and 21,439.65

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Solution

The fourth proportional to 28,165.74, 38,827.32 and 21,439.65 is: 29,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.74 : 38,827.32 = 21,439.65 : x
  2. Step 2: Convert to fraction form
    28,165.74/38,827.32 = 21,439.65/x
  3. Step 3: Cross multiply
    28,165.74x = 38,827.32 × 21,439.65
  4. Step 4: Simplify right side
    28,165.74x = 832,444,151.24
  5. Step 5: Solve for x
    x = 832,444,151.24/28,165.74
  6. Step 6: Final answer
    x = 29,555.20

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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.