Home / 20,779,816.20-31,106,738.70-15,698,977.80

Finding the Fourth Proportional to 20,779,816.20, 31,106,738.70 and 15,698,977.80

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Solution

The fourth proportional to 20,779,816.20, 31,106,738.70 and 15,698,977.80 is: 23,500,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779,816.20 : 31,106,738.70 = 15,698,977.80 : x
  2. Step 2: Convert to fraction form
    20,779,816.20/31,106,738.70 = 15,698,977.80/x
  3. Step 3: Cross multiply
    20,779,816.20x = 31,106,738.70 × 15,698,977.80
  4. Step 4: Simplify right side
    20,779,816.20x = 488,344,000,281,700.88
  5. Step 5: Solve for x
    x = 488,344,000,281,700.88/20,779,816.20
  6. Step 6: Final answer
    x = 23,500,881.60

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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.