Home / 21,378.08-29,503.04-11,947.36

Finding the Fourth Proportional to 21,378.08, 29,503.04 and 11,947.36

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Solution

The fourth proportional to 21,378.08, 29,503.04 and 11,947.36 is: 16,488.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.08 : 29,503.04 = 11,947.36 : x
  2. Step 2: Convert to fraction form
    21,378.08/29,503.04 = 11,947.36/x
  3. Step 3: Cross multiply
    21,378.08x = 29,503.04 × 11,947.36
  4. Step 4: Simplify right side
    21,378.08x = 352,483,439.97
  5. Step 5: Solve for x
    x = 352,483,439.97/21,378.08
  6. Step 6: Final answer
    x = 16,488.08

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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.