Home / 25,418.60-38,128.70-8,779.40

Finding the Fourth Proportional to 25,418.60, 38,128.70 and 8,779.40

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Solution

The fourth proportional to 25,418.60, 38,128.70 and 8,779.40 is: 13,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,418.60 : 38,128.70 = 8,779.40 : x
  2. Step 2: Convert to fraction form
    25,418.60/38,128.70 = 8,779.40/x
  3. Step 3: Cross multiply
    25,418.60x = 38,128.70 × 8,779.40
  4. Step 4: Simplify right side
    25,418.60x = 334,747,108.78
  5. Step 5: Solve for x
    x = 334,747,108.78/25,418.60
  6. Step 6: Final answer
    x = 13,169.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.