Home / 12,477.12-17,217.60-9,831.36

Finding the Fourth Proportional to 12,477.12, 17,217.60 and 9,831.36

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Solution

The fourth proportional to 12,477.12, 17,217.60 and 9,831.36 is: 13,566.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,477.12 : 17,217.60 = 9,831.36 : x
  2. Step 2: Convert to fraction form
    12,477.12/17,217.60 = 9,831.36/x
  3. Step 3: Cross multiply
    12,477.12x = 17,217.60 × 9,831.36
  4. Step 4: Simplify right side
    12,477.12x = 169,272,423.94
  5. Step 5: Solve for x
    x = 169,272,423.94/12,477.12
  6. Step 6: Final answer
    x = 13,566.63

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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.