Home / 21,378.31-29,501.85-11,946.87

Finding the Fourth Proportional to 21,378.31, 29,501.85 and 11,946.87

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Solution

The fourth proportional to 21,378.31, 29,501.85 and 11,946.87 is: 16,486.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.31 : 29,501.85 = 11,946.87 : x
  2. Step 2: Convert to fraction form
    21,378.31/29,501.85 = 11,946.87/x
  3. Step 3: Cross multiply
    21,378.31x = 29,501.85 × 11,946.87
  4. Step 4: Simplify right side
    21,378.31x = 352,454,811.51
  5. Step 5: Solve for x
    x = 352,454,811.51/21,378.31
  6. Step 6: Final answer
    x = 16,486.56

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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.