Home / 15,329.79-21,154.82-8,615.32

Finding the Fourth Proportional to 15,329.79, 21,154.82 and 8,615.32

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Solution

The fourth proportional to 15,329.79, 21,154.82 and 8,615.32 is: 11,888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,329.79 : 21,154.82 = 8,615.32 : x
  2. Step 2: Convert to fraction form
    15,329.79/21,154.82 = 8,615.32/x
  3. Step 3: Cross multiply
    15,329.79x = 21,154.82 × 8,615.32
  4. Step 4: Simplify right side
    15,329.79x = 182,255,447.88
  5. Step 5: Solve for x
    x = 182,255,447.88/15,329.79
  6. Step 6: Final answer
    x = 11,888.97

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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.