Home / 21,351.79-29,465.47-11,920.35

Finding the Fourth Proportional to 21,351.79, 29,465.47 and 11,920.35

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Solution

The fourth proportional to 21,351.79, 29,465.47 and 11,920.35 is: 16,450.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.79 : 29,465.47 = 11,920.35 : x
  2. Step 2: Convert to fraction form
    21,351.79/29,465.47 = 11,920.35/x
  3. Step 3: Cross multiply
    21,351.79x = 29,465.47 × 11,920.35
  4. Step 4: Simplify right side
    21,351.79x = 351,238,685.51
  5. Step 5: Solve for x
    x = 351,238,685.51/21,351.79
  6. Step 6: Final answer
    x = 16,450.08

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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.