Home / 21,320.65-29,421.80-11,760.51

Finding the Fourth Proportional to 21,320.65, 29,421.80 and 11,760.51

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Solution

The fourth proportional to 21,320.65, 29,421.80 and 11,760.51 is: 16,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.65 : 29,421.80 = 11,760.51 : x
  2. Step 2: Convert to fraction form
    21,320.65/29,421.80 = 11,760.51/x
  3. Step 3: Cross multiply
    21,320.65x = 29,421.80 × 11,760.51
  4. Step 4: Simplify right side
    21,320.65x = 346,015,373.12
  5. Step 5: Solve for x
    x = 346,015,373.12/21,320.65
  6. Step 6: Final answer
    x = 16,229.12

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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.