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Finding the Fourth Proportional to 12,889,728.16, 17,787,470.08 and 7,088,509.92

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Solution

The fourth proportional to 12,889,728.16, 17,787,470.08 and 7,088,509.92 is: 9,781,948.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889,728.16 : 17,787,470.08 = 7,088,509.92 : x
  2. Step 2: Convert to fraction form
    12,889,728.16/17,787,470.08 = 7,088,509.92/x
  3. Step 3: Cross multiply
    12,889,728.16x = 17,787,470.08 × 7,088,509.92
  4. Step 4: Simplify right side
    12,889,728.16x = 126,086,658,113,783.17
  5. Step 5: Solve for x
    x = 126,086,658,113,783.17/12,889,728.16
  6. Step 6: Final answer
    x = 9,781,948.58

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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.