Home / 20,520,449.90-28,315,731.57-11,821,438.70

Finding the Fourth Proportional to 20,520,449.90, 28,315,731.57 and 11,821,438.70

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Solution

The fourth proportional to 20,520,449.90, 28,315,731.57 and 11,821,438.70 is: 16,312,151.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520,449.90 : 28,315,731.57 = 11,821,438.70 : x
  2. Step 2: Convert to fraction form
    20,520,449.90/28,315,731.57 = 11,821,438.70/x
  3. Step 3: Cross multiply
    20,520,449.90x = 28,315,731.57 × 11,821,438.70
  4. Step 4: Simplify right side
    20,520,449.90x = 334,732,685,000,409.75
  5. Step 5: Solve for x
    x = 334,732,685,000,409.75/20,520,449.90
  6. Step 6: Final answer
    x = 16,312,151.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.