Home / 20,779,817.20-31,106,740.20-15,698,978.80

Finding the Fourth Proportional to 20,779,817.20, 31,106,740.20 and 15,698,978.80

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Solution

The fourth proportional to 20,779,817.20, 31,106,740.20 and 15,698,978.80 is: 23,500,883.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779,817.20 : 31,106,740.20 = 15,698,978.80 : x
  2. Step 2: Convert to fraction form
    20,779,817.20/31,106,740.20 = 15,698,978.80/x
  3. Step 3: Cross multiply
    20,779,817.20x = 31,106,740.20 × 15,698,978.80
  4. Step 4: Simplify right side
    20,779,817.20x = 488,344,054,936,907.75
  5. Step 5: Solve for x
    x = 488,344,054,936,907.75/20,779,817.20
  6. Step 6: Final answer
    x = 23,500,883.10

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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.