Home / 15,817.36-21,831.30-9,107.68

Finding the Fourth Proportional to 15,817.36, 21,831.30 and 9,107.68

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Solution

The fourth proportional to 15,817.36, 21,831.30 and 9,107.68 is: 12,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.36 : 21,831.30 = 9,107.68 : x
  2. Step 2: Convert to fraction form
    15,817.36/21,831.30 = 9,107.68/x
  3. Step 3: Cross multiply
    15,817.36x = 21,831.30 × 9,107.68
  4. Step 4: Simplify right side
    15,817.36x = 198,832,494.38
  5. Step 5: Solve for x
    x = 198,832,494.38/15,817.36
  6. Step 6: Final answer
    x = 12,570.52

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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.