Home / 21,378.08-29,501.79-11,946.64

Finding the Fourth Proportional to 21,378.08, 29,501.79 and 11,946.64

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Solution

The fourth proportional to 21,378.08, 29,501.79 and 11,946.64 is: 16,486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.08 : 29,501.79 = 11,946.64 : x
  2. Step 2: Convert to fraction form
    21,378.08/29,501.79 = 11,946.64/x
  3. Step 3: Cross multiply
    21,378.08x = 29,501.79 × 11,946.64
  4. Step 4: Simplify right side
    21,378.08x = 352,447,338.24
  5. Step 5: Solve for x
    x = 352,447,338.24/21,378.08
  6. Step 6: Final answer
    x = 16,486.39

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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.