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Finding the Fourth Proportional to 10,615.69, 15,925.83 and 3,220.71

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Solution

The fourth proportional to 10,615.69, 15,925.83 and 3,220.71 is: 4,831.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,615.69 : 15,925.83 = 3,220.71 : x
  2. Step 2: Convert to fraction form
    10,615.69/15,925.83 = 3,220.71/x
  3. Step 3: Cross multiply
    10,615.69x = 15,925.83 × 3,220.71
  4. Step 4: Simplify right side
    10,615.69x = 51,292,479.94
  5. Step 5: Solve for x
    x = 51,292,479.94/10,615.69
  6. Step 6: Final answer
    x = 4,831.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.