Home / 15,005.44-20,685.54-10,515.61

Finding the Fourth Proportional to 15,005.44, 20,685.54 and 10,515.61

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Solution

The fourth proportional to 15,005.44, 20,685.54 and 10,515.61 is: 14,496.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.44 : 20,685.54 = 10,515.61 : x
  2. Step 2: Convert to fraction form
    15,005.44/20,685.54 = 10,515.61/x
  3. Step 3: Cross multiply
    15,005.44x = 20,685.54 × 10,515.61
  4. Step 4: Simplify right side
    15,005.44x = 217,521,071.28
  5. Step 5: Solve for x
    x = 217,521,071.28/15,005.44
  6. Step 6: Final answer
    x = 14,496.15

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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.