Home / 15,355.86-21,190.77-9,387.60

Finding the Fourth Proportional to 15,355.86, 21,190.77 and 9,387.60

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Solution

The fourth proportional to 15,355.86, 21,190.77 and 9,387.60 is: 12,954.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.86 : 21,190.77 = 9,387.60 : x
  2. Step 2: Convert to fraction form
    15,355.86/21,190.77 = 9,387.60/x
  3. Step 3: Cross multiply
    15,355.86x = 21,190.77 × 9,387.60
  4. Step 4: Simplify right side
    15,355.86x = 198,930,472.45
  5. Step 5: Solve for x
    x = 198,930,472.45/15,355.86
  6. Step 6: Final answer
    x = 12,954.69

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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.