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Finding the Fourth Proportional to 10,368,645.80, 15,552,968.70 and 9,780,780.20

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Solution

The fourth proportional to 10,368,645.80, 15,552,968.70 and 9,780,780.20 is: 14,671,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368,645.80 : 15,552,968.70 = 9,780,780.20 : x
  2. Step 2: Convert to fraction form
    10,368,645.80/15,552,968.70 = 9,780,780.20/x
  3. Step 3: Cross multiply
    10,368,645.80x = 15,552,968.70 × 9,780,780.20
  4. Step 4: Simplify right side
    10,368,645.80x = 152,120,168,312,179.72
  5. Step 5: Solve for x
    x = 152,120,168,312,179.72/10,368,645.80
  6. Step 6: Final answer
    x = 14,671,170.30

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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.