Home / 20,565.81-28,381.93-11,613.69

Finding the Fourth Proportional to 20,565.81, 28,381.93 and 11,613.69

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Solution

The fourth proportional to 20,565.81, 28,381.93 and 11,613.69 is: 16,027.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.81 : 28,381.93 = 11,613.69 : x
  2. Step 2: Convert to fraction form
    20,565.81/28,381.93 = 11,613.69/x
  3. Step 3: Cross multiply
    20,565.81x = 28,381.93 × 11,613.69
  4. Step 4: Simplify right side
    20,565.81x = 329,618,907.59
  5. Step 5: Solve for x
    x = 329,618,907.59/20,565.81
  6. Step 6: Final answer
    x = 16,027.52

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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.