Home / 21,000,411.89-28,986,973.67-12,182,091.64

Finding the Fourth Proportional to 21,000,411.89, 28,986,973.67 and 12,182,091.64

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Solution

The fourth proportional to 21,000,411.89, 28,986,973.67 and 12,182,091.64 is: 16,815,002.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000,411.89 : 28,986,973.67 = 12,182,091.64 : x
  2. Step 2: Convert to fraction form
    21,000,411.89/28,986,973.67 = 12,182,091.64/x
  3. Step 3: Cross multiply
    21,000,411.89x = 28,986,973.67 × 12,182,091.64
  4. Step 4: Simplify right side
    21,000,411.89x = 353,121,969,735,246.62
  5. Step 5: Solve for x
    x = 353,121,969,735,246.62/21,000,411.89
  6. Step 6: Final answer
    x = 16,815,002.08

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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.