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Finding the Fourth Proportional to 18,718,641.64, 25,829,351.28 and 10,980,860.68

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Solution

The fourth proportional to 18,718,641.64, 25,829,351.28 and 10,980,860.68 is: 15,152,194.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718,641.64 : 25,829,351.28 = 10,980,860.68 : x
  2. Step 2: Convert to fraction form
    18,718,641.64/25,829,351.28 = 10,980,860.68/x
  3. Step 3: Cross multiply
    18,718,641.64x = 25,829,351.28 × 10,980,860.68
  4. Step 4: Simplify right side
    18,718,641.64x = 283,628,507,892,746.38
  5. Step 5: Solve for x
    x = 283,628,507,892,746.38/18,718,641.64
  6. Step 6: Final answer
    x = 15,152,194.98

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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.