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Finding the Fourth Proportional to 15,812.71, 21,831.61 and 9,853.14

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Solution

The fourth proportional to 15,812.71, 21,831.61 and 9,853.14 is: 13,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.71 : 21,831.61 = 9,853.14 : x
  2. Step 2: Convert to fraction form
    15,812.71/21,831.61 = 9,853.14/x
  3. Step 3: Cross multiply
    15,812.71x = 21,831.61 × 9,853.14
  4. Step 4: Simplify right side
    15,812.71x = 215,109,830.54
  5. Step 5: Solve for x
    x = 215,109,830.54/15,812.71
  6. Step 6: Final answer
    x = 13,603.60

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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.