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Finding the Fourth Proportional to 9,998,831.16, 13,798,404.45 and 5,415,152.54

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Solution

The fourth proportional to 9,998,831.16, 13,798,404.45 and 5,415,152.54 is: 7,472,919.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998,831.16 : 13,798,404.45 = 5,415,152.54 : x
  2. Step 2: Convert to fraction form
    9,998,831.16/13,798,404.45 = 5,415,152.54/x
  3. Step 3: Cross multiply
    9,998,831.16x = 13,798,404.45 × 5,415,152.54
  4. Step 4: Simplify right side
    9,998,831.16x = 74,720,464,836,372.78
  5. Step 5: Solve for x
    x = 74,720,464,836,372.78/9,998,831.16
  6. Step 6: Final answer
    x = 7,472,919.95

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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.