Home / 21,050,002.80-31,575,004.20-11,980,076.40

Finding the Fourth Proportional to 21,050,002.80, 31,575,004.20 and 11,980,076.40

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Solution

The fourth proportional to 21,050,002.80, 31,575,004.20 and 11,980,076.40 is: 17,970,114.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050,002.80 : 31,575,004.20 = 11,980,076.40 : x
  2. Step 2: Convert to fraction form
    21,050,002.80/31,575,004.20 = 11,980,076.40/x
  3. Step 3: Cross multiply
    21,050,002.80x = 31,575,004.20 × 11,980,076.40
  4. Step 4: Simplify right side
    21,050,002.80x = 378,270,962,646,320.88
  5. Step 5: Solve for x
    x = 378,270,962,646,320.88/21,050,002.80
  6. Step 6: Final answer
    x = 17,970,114.60

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1.5x scale

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.