Home / 20,956.68-28,920.10-11,525.16

Finding the Fourth Proportional to 20,956.68, 28,920.10 and 11,525.16

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Solution

The fourth proportional to 20,956.68, 28,920.10 and 11,525.16 is: 15,904.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.68 : 28,920.10 = 11,525.16 : x
  2. Step 2: Convert to fraction form
    20,956.68/28,920.10 = 11,525.16/x
  3. Step 3: Cross multiply
    20,956.68x = 28,920.10 × 11,525.16
  4. Step 4: Simplify right side
    20,956.68x = 333,308,779.72
  5. Step 5: Solve for x
    x = 333,308,779.72/20,956.68
  6. Step 6: Final answer
    x = 15,904.66

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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.