Home / 21,155.93-31,702.70-11,783.04

Finding the Fourth Proportional to 21,155.93, 31,702.70 and 11,783.04

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Solution

The fourth proportional to 21,155.93, 31,702.70 and 11,783.04 is: 17,657.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.93 : 31,702.70 = 11,783.04 : x
  2. Step 2: Convert to fraction form
    21,155.93/31,702.70 = 11,783.04/x
  3. Step 3: Cross multiply
    21,155.93x = 31,702.70 × 11,783.04
  4. Step 4: Simplify right side
    21,155.93x = 373,553,964.78
  5. Step 5: Solve for x
    x = 373,553,964.78/21,155.93
  6. Step 6: Final answer
    x = 17,657.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.