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Finding the Fourth Proportional to 25,779, 35,569.62 and 15,169.80

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Solution

The fourth proportional to 25,779, 35,569.62 and 15,169.80 is: 20,931.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,779 : 35,569.62 = 15,169.80 : x
  2. Step 2: Convert to fraction form
    25,779/35,569.62 = 15,169.80/x
  3. Step 3: Cross multiply
    25,779x = 35,569.62 × 15,169.80
  4. Step 4: Simplify right side
    25,779x = 539,584,021.48
  5. Step 5: Solve for x
    x = 539,584,021.48/25,779
  6. Step 6: Final answer
    x = 20,931.15

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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.