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Finding the Fourth Proportional to 18,888,848.40, 28,286,033.40 and 15,109,712.40

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Solution

The fourth proportional to 18,888,848.40, 28,286,033.40 and 15,109,712.40 is: 22,626,780.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888,848.40 : 28,286,033.40 = 15,109,712.40 : x
  2. Step 2: Convert to fraction form
    18,888,848.40/28,286,033.40 = 15,109,712.40/x
  3. Step 3: Cross multiply
    18,888,848.40x = 28,286,033.40 × 15,109,712.40
  4. Step 4: Simplify right side
    18,888,848.40x = 427,393,829,610,794.12
  5. Step 5: Solve for x
    x = 427,393,829,610,794.12/18,888,848.40
  6. Step 6: Final answer
    x = 22,626,780.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.