Home / 15,509.49-21,403.08-8,435.97

Finding the Fourth Proportional to 15,509.49, 21,403.08 and 8,435.97

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Solution

The fourth proportional to 15,509.49, 21,403.08 and 8,435.97 is: 11,641.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.49 : 21,403.08 = 8,435.97 : x
  2. Step 2: Convert to fraction form
    15,509.49/21,403.08 = 8,435.97/x
  3. Step 3: Cross multiply
    15,509.49x = 21,403.08 × 8,435.97
  4. Step 4: Simplify right side
    15,509.49x = 180,555,740.79
  5. Step 5: Solve for x
    x = 180,555,740.79/15,509.49
  6. Step 6: Final answer
    x = 11,641.63

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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.