Home / 15,347.95-21,179.82-9,379.60

Finding the Fourth Proportional to 15,347.95, 21,179.82 and 9,379.60

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Solution

The fourth proportional to 15,347.95, 21,179.82 and 9,379.60 is: 12,943.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.95 : 21,179.82 = 9,379.60 : x
  2. Step 2: Convert to fraction form
    15,347.95/21,179.82 = 9,379.60/x
  3. Step 3: Cross multiply
    15,347.95x = 21,179.82 × 9,379.60
  4. Step 4: Simplify right side
    15,347.95x = 198,658,239.67
  5. Step 5: Solve for x
    x = 198,658,239.67/15,347.95
  6. Step 6: Final answer
    x = 12,943.63

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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.