Home / 15,817.38-21,831.66-9,106.86

Finding the Fourth Proportional to 15,817.38, 21,831.66 and 9,106.86

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Solution

The fourth proportional to 15,817.38, 21,831.66 and 9,106.86 is: 12,569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.38 : 21,831.66 = 9,106.86 : x
  2. Step 2: Convert to fraction form
    15,817.38/21,831.66 = 9,106.86/x
  3. Step 3: Cross multiply
    15,817.38x = 21,831.66 × 9,106.86
  4. Step 4: Simplify right side
    15,817.38x = 198,817,871.19
  5. Step 5: Solve for x
    x = 198,817,871.19/15,817.38
  6. Step 6: Final answer
    x = 12,569.58

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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.