Home / 21,378.38-29,501.60-11,947.01

Finding the Fourth Proportional to 21,378.38, 29,501.60 and 11,947.01

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Solution

The fourth proportional to 21,378.38, 29,501.60 and 11,947.01 is: 16,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.38 : 29,501.60 = 11,947.01 : x
  2. Step 2: Convert to fraction form
    21,378.38/29,501.60 = 11,947.01/x
  3. Step 3: Cross multiply
    21,378.38x = 29,501.60 × 11,947.01
  4. Step 4: Simplify right side
    21,378.38x = 352,455,702.97
  5. Step 5: Solve for x
    x = 352,455,702.97/21,378.38
  6. Step 6: Final answer
    x = 16,486.55

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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.