Home / 15,781.18-21,779.55-11,795.35

Finding the Fourth Proportional to 15,781.18, 21,779.55 and 11,795.35

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Solution

The fourth proportional to 15,781.18, 21,779.55 and 11,795.35 is: 16,278.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.18 : 21,779.55 = 11,795.35 : x
  2. Step 2: Convert to fraction form
    15,781.18/21,779.55 = 11,795.35/x
  3. Step 3: Cross multiply
    15,781.18x = 21,779.55 × 11,795.35
  4. Step 4: Simplify right side
    15,781.18x = 256,897,415.09
  5. Step 5: Solve for x
    x = 256,897,415.09/15,781.18
  6. Step 6: Final answer
    x = 16,278.72

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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.