Home / 28,085,999.40-42,128,999.10-12,969,455.40

Finding the Fourth Proportional to 28,085,999.40, 42,128,999.10 and 12,969,455.40

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Solution

The fourth proportional to 28,085,999.40, 42,128,999.10 and 12,969,455.40 is: 19,454,183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,999.40 : 42,128,999.10 = 12,969,455.40 : x
  2. Step 2: Convert to fraction form
    28,085,999.40/42,128,999.10 = 12,969,455.40/x
  3. Step 3: Cross multiply
    28,085,999.40x = 42,128,999.10 × 12,969,455.40
  4. Step 4: Simplify right side
    28,085,999.40x = 546,390,174,874,090.19
  5. Step 5: Solve for x
    x = 546,390,174,874,090.19/28,085,999.40
  6. Step 6: Final answer
    x = 19,454,183.10

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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.