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Finding the Fourth Proportional to 15,117.58, 20,866.71 and 8,831.44

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Solution

The fourth proportional to 15,117.58, 20,866.71 and 8,831.44 is: 12,189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.58 : 20,866.71 = 8,831.44 : x
  2. Step 2: Convert to fraction form
    15,117.58/20,866.71 = 8,831.44/x
  3. Step 3: Cross multiply
    15,117.58x = 20,866.71 × 8,831.44
  4. Step 4: Simplify right side
    15,117.58x = 184,283,097.36
  5. Step 5: Solve for x
    x = 184,283,097.36/15,117.58
  6. Step 6: Final answer
    x = 12,189.99

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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.