Home / 21,378.77-29,499.40-11,945.51

Finding the Fourth Proportional to 21,378.77, 29,499.40 and 11,945.51

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Solution

The fourth proportional to 21,378.77, 29,499.40 and 11,945.51 is: 16,482.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.77 : 29,499.40 = 11,945.51 : x
  2. Step 2: Convert to fraction form
    21,378.77/29,499.40 = 11,945.51/x
  3. Step 3: Cross multiply
    21,378.77x = 29,499.40 × 11,945.51
  4. Step 4: Simplify right side
    21,378.77x = 352,385,466.37
  5. Step 5: Solve for x
    x = 352,385,466.37/21,378.77
  6. Step 6: Final answer
    x = 16,482.96

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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.